题目内容

尿嘧啶的分解产物是β-丙氨酸

A. 对
B. 错

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嘌呤核苷酸的合成顺序是,首先合成次黄嘌呤核苷酸,再进一步转化为腺嘌呤核苷酸和鸟嘌呤核苷酸

A. 对
B. 错

It was reported that the earthquake was the most ____to have struck that area in fifty years.

A. special
B. powerful
C. favorite
D. exciting

It took the experts several months to decide on the ____for the new airport.

A. source
B. earth
C. site
D. character

The workers are repairing the house. It was ____by a fallen tree during the last storm.

A. struck
B. operated
C. described
D. calculated

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