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【单选题】
关于嘌呤核苷酸从头合成的叙述，下列哪错误的A.
占体内合成嘌呤核苷酸总量的90％
B.
利用简单嘌呤碱的前身物质合成嘌呤核苷酸
C.
需经过复杂的酶促反应，会消耗大量原料和ATP
D.
氨基甲酰磷酸为嘌呤环提供甲酰基
E.
提供甲酰基的是N5，N10-甲炔四氢叶酸
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举一反三
【单选题】—Could you tell us how long ________ ? —About three days.
A.
does the sports meeting last
B.
the sports meeting last
C.
will the sports meeting last
D.
the sports meeting will last
【单选题】Because of the rain, the headmaster suggested that the sports meeting ______ until next week.
A.
should put off
B.
would be put off
C.
would put off
D.
be put off
【单选题】The sports meeting next month.
A.
will hold
B.
is going to hold
C.
will be held
D.
will be hold
【简答题】The president made a ________ speech at the opening ceremony of the sports meeting, which encouraged the sportsmen greatly. A) vigorous B) tedious C) flat D) harsh
【单选题】----Could you tell us how long ? ---- About three days.
A.
does the sports meeting last
B.
the sports meeting will last
C.
the sports meeting last
D.
will the sports meeting last
【单选题】The boys by the coach now will take part in the sports meeting of the school next month．
A.
chosen
B.
being chosen
C.
choosing
D.
to be chosen
【简答题】When will the sports meeting be held?
【简答题】根据致热刺激物的来源不同,可将致热原分为( ) 和( ) 。
相关题目：
【单选题】The sports meeting next month.
A.
will hold
B.
is going to hold
C.
will be held
D.
will be hold