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【单选题】
酶促反应达最大速度后,增加底物浓度不能加快反应速度的原因是:A.
全部酶与底物结合成E-S复合体
B.
过量底物对酶有负反馈抑制
C.
过量底物与激活剂结合影响底物与酶的结合
D.
改变了化学反应的平衡点
E.
以上都不是
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皮皮学刷刷变学霸
举一反三
【单选题】____ the silkworm makes a liquid in its body and then squeezes it out through special holes.
A.
It makes silk
B.
Making silk
C.
To make silk
D.
Silk is made by
【判断题】Scientists long to understand just how exactly the silkworm manages the process of silk weaving, and now they’ve got a thorough knowledge of it.
A.
正确
B.
错误
【单选题】Which is not the reason why scientists long to understand just how exactly the silkworm manages the process of silk weaving?
A.
Because they want to replicate the process.
B.
Because they want to produce high-strength and high-performance materials for sports and law enforcement.
C.
Because silk is a very useful natural fiber in the world .
D.
not mentioned.
【简答题】以下各种存储设备，存取速度最快的是( ) (A)磁介质 (B)硬盘 (C)可擦写光盘 (D)WORM
【单选题】The silkworm is an insect worth_____.
A.
to study
B.
studying
C.
to be studied
D.
being studied
【简答题】Up Broadway he turned, and halted at a glittering café, where are gathered together nightly the choicest products of the gs, the silkworm and the protoplasm.
【单选题】The silkworm is an insect worth _____.
A.
to know
B.
knowing
C.
to be known
D.
being known
相关题目：
【单选题】The silkworm is an insect worth_____.
A.
to study
B.
studying
C.
to be studied
D.
being studied