题目内容

原癌基因转变为癌基因的主要途径是

A. 编码缺失或单碱基突变
B. 基因扩增
C. 染色体重排
D. 都是

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下列基因中属于抑癌基因的是

A. sis基因
B. myb基因
C. p53基因
D. Rb基因

根据原癌基因产物在细胞中的位置将其分为

A. 与膜结合的蛋白质
B. 可溶性蛋白
C. 核蛋白
D. 溶酶体蛋白

More and more British people are fed up of 1)__________ on packed commuter trains or tired of being sat in endless traffic queues. Some of them choose to 2) __________and commute to their jobs in Britain. They are Britain's dream commuters. It's 3) __________ in Europe and budget flights that are changing the way they live.Justin Saunders is part of Britain's dream commuters. He runs 4) __________ near Reading. At the end of the working week, he flies from Gatwick to his house in a village in southwest France, an hour's drive from Toulouse Airport and over 700 miles from his Hampshire office. When he books the flights early enough, he pays something like 5) __________ for a return ticket. He and his family decided to move to France for the better 6) __________They were fed up with the commuting and 7) __________.

Which of the following statements is true of Peking Opera?

A. The real charm of Peking Opera is created by the actors
B. The actors usually stand at the center of the stage
C. There must be famous arias in any Peking Opera
D. Speaking is designed to attract the audience's attention

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