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【单选题】
在一个随机杂交的群体中，多基因遗传的变异范围广泛，大多数个体接近于中间类型，极端变异的个体很少，这些变异的产生是A.
多对基因的分离和自由组合以及环境因素共同作用的结果
B.
遗传基础差异造成的
C.
环境因素影响的结果
D.
遗传背景互相作用的结果
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【单选题】The word 'tycoon' in the last paragraph is ______.
A.
derived from a Japanese word, meaning a businessman with great wealth and power
B.
an English translation of a Russian word, meaning a man of great consequence
C.
borrowed from Portuguese, meaning an industrialist with a great man of money obtained illegally
D.
rarely used now because of its derogatory meaning
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【单选题】Last year, my classmate Jane and I graduated from an ordinary normal university. Like most of the students who had just stepped out of university, we had to【21】. The first tough test——job hunting to【2...
A.
look through
B.
live through
C.
go through
D.
go on
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【单选题】This word is ______ from Latin word.
A.
deprived
B.
derived
C.
dispatched
D.
discharged
【单选题】In word formation, the word ' ______' is different from the other three.
A.
lovely
B.
kingly
C.
highly
D.
daily
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