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【简答题】
. 诱发突变?诱变因素种类繁多,诱变机理也不尽相同,常用的诱变因素有哪些?
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举一反三
【单选题】The statesman made a proposal that the Iraqi issue ______ at the next meeting.
A.
was considered
B.
would be considered
C.
be considered
D.
considered
【单选题】I admit that there are problems, I don’t think that they can’t be solved.
A.
While
B.
When
C.
As
D.
For
【单选题】What does Professor Stevenson think of China's economy?
A.
Its rapid growth is beneficial to the world.
B.
It can be seen as a model by the rest of the world.
C.
Its success can ’ t be explained by elementary economics.
D.
It will continue to surge forward in the future.
【单选题】What is probably the woman's job?
A.
A scientist.
B.
A reporter.
C.
Am embassy staff.
【单选题】免疫球蛋白在同种动物不同个体间呈现抗原性的抗原决定簇是( )。
A.
自身抗原决定簇
B.
同种异型抗原决定簇
C.
同种型抗原决定簇
D.
异嗜性抗原决定簇
E.
独特性抗原决定簇
【单选题】______ I admit that the problems are difficult, I don't agree that they cannot be solved.
A.
When
B.
Where
C.
While
D.
Why
【单选题】What is the man's chief complaint?
A.
His workload was much too heavy.
B.
His immediate boss did not trust him.
C.
His colleagues often refused to cooperate.
D.
His salary was too low for his responsibility.
【单选题】What do we learn about the man’s holiday?(conversation 2)
A.
It was an enjoyable experience
B.
It was more expensive than he thought
C.
It was a bad experience in some ways
D.
It was helpful for him to learn new language
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