2019-2020年高三11月周考英语试题 缺答案

2019-2020年高三11月周考英语试题 缺答案

（时间120分钟，满分150） xx.11

第Ⅰ卷（共70分）

Ⅱ. Grammar and vocabulary（20%） Section A

Directions: After reading the passages below, fill in the blanks to make the passages coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

In most industrialized countries about 105 boys are born for every 100 girls, for a ratio of 1.05, known as the secondary sex ratio, or SSR; the primary sex ratio is the ratio at conception. This is often expressed as the percentage of boys among all births, or about 51.2 percent. The percentage of males among all births is not fixed, however. Since the 1950s and 1960s the overall SSR 25 (decline) in the U.S., Canada and several European countries, there are also both personal and environmental factors that affect the average sex ratio.

26 chance of having a boy appears 27 (decline)with the mother's age, the father's age and the number of children the family already has. These effects are small. One study in Denmark found that the SSR of children born to fathers younger than 25 was 51.6 percent, which decreased 28 51.0 percent among children of fathers at least 40 years of age. Therefore it is unlikely that the declining SSR in many countries results solely from large-scale changes in such personal factors.

With regard to environmental factors, improved prenatal and obstetrical care during the first part of the 20th century is largely responsible for an 29 (increase) SSR over this period in many countries. The male fetus is more susceptible to loss in the womb than is the female fetus, so with more conceptions reaching term, proportionally more males are born.

It is difficult to discern how much of the decrease in sex ratio since the 1950s arises from contaminants in the environment. What is known is that drug use, high occupational exposures

and environmental accidents 30 affect SSR. For example, hopeful mothers 31 (take) clomiphene citrate (Clomid) for infertility bore babies with an SSR of only 48.5 percent.

Workers producing 1,2-dibromo-3-chloropropane (DBCP), a chemical used to kill worms in agriculture, experienced even larger decreases in the number of male babies. Effects of DBCP on sperm quality 32 (discover) incidentally when male workers found that they were unable to father children. After the exposure ended, male workers experienced some recovery of sperm quality and 36 children were born to 44 workers. Of these 36 children only 10 were boys--an SSR of just 27.8 percent.

These dramatic changes resulting from extreme exposures raise the concern that chemicals in the environment at 33 (low) concentrations may also change the SSR by exposing people over longer periods of time. For example, there are reports that parental exposure to polychlorinated biphenyls (PCBs) and mercury, each of which is widely distributed in the environment, can affect the sex ratio. 34 (confirm) such effects will take careful work on large populations, but the results may be quite important. Section B（8%）

Directions: plete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. acpanying AC. generally B. add AD. granted C. adolescents BC. limited D. emphasizing BD. oriented CD. regularly AB. experience ABC. scene Wandering around art galleries and museums will be a regular feature of school life, thanks to a curriculum reform package aimed at broadening young minds.

Teachers will soon be 35 students into venues where they will be exposed to the arts, said Shanghai vice mayor Weng Tiehui at a meeting with local political advisers yesterday.

“Shanghai has been 36 artistic education and requiring students to have at least one artistic skill before graduating from high school,” Weng said at the fourth session of the 12th Shanghai mittee of the Chinese People’s Political Consultative Conference.

“We plan to 37 watching dramas or seeing exhibitions to curricula, such as Chinese, art and music courses. We will take students into artistic venues.”

“We hope that our children will enjoy visiting theaters, galleries and museums after work to make their life more colorful when they grow up,” she added.

“Most theaters for 38 are empty on weekdays, which means our schools have

not made good use of them,” said Cai Jinping, a political adviser and director of the Children’s Theater of China Welfare Institute. ”Artistic education should not be 39 to music or art classes in schools,” Cai said.

“We have to bring children into professional venues to 40 the plete presentation of real and elegant arts in person.”

Wang Yang, principal of Caoyang No 2 High School, weled the plan, saying that Chinese students do not enjoy the same standard of arts 41 extracurricular activities that are taken for 42 in western countries.

“It’s important to cultivate artistic tastes in our children when they are young. Listening to a concert when being taught about a musician, or seeing an exhibition after learning about the artist, would be really helpful in understanding the arts,” he told Shanghai Daily.

“But most students focus on lessons at school and only some who are members of student artistic groups have the opportunity to visit artistic venues 43 .”

He said that some parents bring children to concerts or exhibitions on weekends, but not every family can afford it.

“Visits to galleries and theaters are cheaper when they are organized by schools,” Wang said, adding that the government could help to improve Shanghai’s cultural 44 by building new arts venues.

Reading prehension（45%） Section A

Directions: For each blank in the following passage there are four words or phrases marked A,B,C and D. Fill in each blank with the word or phrase that best fits the context.

While on summer break in xx, Jack Andraka made a breakthrough in cancer detection that had eluded medical experts. The boy from Maryland was 15.

Using information he found on Google and Wikipedia, the boy 45 an idea for diagnostic test for pancreatic cancer(胰岛腺). The test, he says, is 168 times 46 , 400 times more sensitive and 26,000 times more economical than the medical 47 . Currently, to screen the blood of a patient 48 for pancreatic cancer, doctors must send vials to a lab, where blood 49 are tested for increased levels of a biomarker.

Cancer researchers and doctors say that these tests, which are 60 years old, often don’t show any abnormalities even when the cancer is 50 . Andraka’s test provides an answer on the spot in five minutes with what he estimates is close to 100 percent 51 . It involves dipping filter paper in a solution which detects a(n) 52 protein. 53 the blood contains the biomarker, it changes the paper’s electrical potential, which can be 54 with an ohmmeter.

The now 17-year-old first got the idea for the project at age 13 when a family friend “who was like an uncle” to him died from the disease, one of the deadliest types of cancer. The whiz kid, who became interested in science at an early age and spends much of his time in the lab, 55 help from scientists and began to carry out one experiment after another to eventually 56 . Len Lichtenfeld, a medical expert at the American Cancer Society, 57 Andraka’s work as an “incredible acplishment.” In xx, Andraka was awarded the $75,000 grand prize in the Intel International Science and Engineering Fair for his work. Since then, he has bee a(n) 58 in scientific circles and has travelled around the world to give TED talks.

While the test isn’t available mercially yet, Andraka is working with several panies to continue to test and 59 the product in the hope that it can be sold over- the-counter in the future.

45.A.caught up with 46.A.clearer 47.A.format 48.A.at cost 49.A.case 50.A.advanced 51.A.accuracy 52.A.especial 53.A.Although 54.A.calculated 55.A.chased

B. came up with B. earlier B. frame B. at risk B. example B. awaited B. clarity B. exact B. Because B. checked B. hunted

C. looked forward to C. faster C. level C. in shadow C. sample C. suffered C. definition C. special C. If C. estimated C. searched

D. gave up on D. slower D. standard D. in trouble D. symbol D. sensed D. distinction D. specific D. When D. measured D. sought