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【单选题】
What’s wrong about the narration of KmA.
is the characteristic constant of the enzyme
B.
The substrate constration when V= Vmax / 2
C.
The greater the Km, the smaller the affinity of the enzyme to the substrate
D.
Independent of the enzyme-catalyzed substrate
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【简答题】郭念峰老师提出的判断正常异常的三原则
【单选题】凡是在实验室工作的师生,要严格遵守实验室操作规程,并且在实验完成离开时负责(),锁好门窗,以防火灾和爆炸、溢水等事故。
A.
关闭仪器设备
B.
关闭水源、电源、气源
C.
关闭计算机
D.
以上都是
【单选题】With economy increasing steadily, people ______ enjoy a life of higher quality.
A.
should
B.
can
C.
may
D.
must
【单选题】I had just started back for the house to change my clothes _____I heard my name called.
A.
as
B.
for
C.
while
D.
when
【单选题】In author's opinion, the sudden appearance of higher-quality goods suggests its officials ______.
A.
become more concerned about the quality and domestic market
B.
turn to other ways to stimulate and enforce export rules
C.
have to improve goods' quality for the qualification of exports
D.
want consumers to buy better products at low prices
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