_________

【名词&注释】

毛茛科(ranunculaceae)、原产地(origin)、共同点(common ground)、噬菌体(phage)、遗传物质(genetic material)、购物袋(shopping bag)、物美价廉、生产厂(production factory)、肺炎双球菌(diplococcus pneumoniae)、虫媒传粉(insect pollination)

[单选题]_________

A. research
B. study
C. recognize
D. explore

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举一反三：

[单选题]How did the acidcent happen ?

A. a longhit a car
B. a car ran into a lorry
C. a bank clerk rushed into the street .

[单选题]CAmerican cities are similar to other cities around the world; In every country. Cities reflect the values of the culture. American cities are changing， just as American society is changing.

A. After Wolld Wa Ⅱ,the population of most large American cities decreased; bowever. The populaton In omthe Sun Belt cities increased. Los Angeles and Houston are eitit where populatfon shife（转移）to and from the oity reflect the changing values of Amorican society. In the late 1940s and early 1950s,city residents（居民）became wealthier. They had more children so they needed more space, They moved out of their apartments in the city to buy their own homes. They bought houses in the suburbs（郊区）.
B. Now things are changing. The children of the people who left the cities in the 1950s are now adults. Many, unlike their parents, want to live in the cities. They continue to move to Sun Belt cities and older ones of the Northeast and Midwest. Many young professionals are moving back into city. They prefer the city to the burbs because their jobs are there; or they jus enjoy the excitement and possibii that the city offers.
C. his people shift is bringing problems as well as benefits. Countless poot people must leave their apartments in the city because the owners want to sell the buildings or make apartments for sale instead of for rent. In the 1950s, many poor people did not have enough money to move to the suburbs; now many of these same people do not have enough money to stay in the cities.
D. Only a few years ago, people though that the older American cities were dying. Some city residents now see a bright, new fiture, Others see only problems and comfiels the thing is sure many dying cities are alive again.
E. 64. What does the author think of cities all over the world?
F. They are alive.
G. They are hopeless.
H. They are similar.
I. They are different.

[单选题]毛茛科的( )植物已在适应虫媒传粉^{(insect pollination)}的方向上高度特化。

A. 毛茛属
B. 黄连属
C. 铁线莲属
D. 乌头属

[单选题]近期研制出利用玉米叶片加工、编织购物袋的技术，这种购物袋易分解且物美价廉。据此完成1~3题。1.该种购物袋的生产厂^{(production factory)}应该近

A. 原料产地 B．销售产地
B. 能原产地 D．研发基地

[单选题]the fact that she was foreign made _____difficult for hertogetajobinthatcountry

A. so
B. much
C. that
D. it

[单选题]艾弗里等人的肺炎双球菌^{(diplococcus pneumoniae)}转化实验和赫尔希与蔡斯的噬菌体侵染细菌试验都证明了DNA是遗传物质。这两个实验在设计思路上的共同点是

A. 重组DNA片段，研究其表型效应
B. 诱发DNA突变，研究其表型效应
C. 设法把DNA与蛋白质分开，研究各自的效应
D. 应用同位素示踪技术，研究DNA在亲代与子代之间的传递

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