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【单选题】
关于蛋白质四级结构正确的是: 答( )A.
一定有多个不同的亚基
B.
一定有多个相同的亚基
C.
一定有种类相同，而数目不同的亚基；或者种类不同，而数目相同的亚基
D.
亚基的种类和数目都不定
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【简答题】创建表单时, method 属性有两个取值,分别是: get 和
【单选题】The biggest problem with the computer is that
A.
she doesn't know the program very well.
B.
it regularly stops working.
C.
the monitor is too small.
【简答题】按要求完成下列各句。 1. They think the computer is very useful. (改为反意疑问句) They think the computer is very useful, _______ _______? 2. It is impossible that a child can lift such a heavy box. (改为同义句) It is impos...
【判断题】The computer center is very popular among the students in this school. It was opened last year. →The computer center, opened last year, is very popular among the students in this school.
A.
正确
B.
错误
【单选题】The computer is very _____ in our life. Some people even say that they can't live without it.
A.
helpful
B.
thankful
C.
careful
D.
harmful
【简答题】完形填空。 The computer is a very wonderful machine, and it is so 1 today that it seems we 2 live or work without it. Computers are used in many 3 in offices, in factories, in big shops, at schools, and ev...
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