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【单选题】
酶促反应初速度是指A.
最适PH时的反应速度
B.
底物浓度只消耗5%以内时的反应速度
C.
足够的底物浓度与酶结合形成络合物使酶达到饱和状态
D.
最适温度时的反应速度
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【单选题】听力原文：Woman: Good morning. I’m calling about your advertisement in Stationery News looking for overseas distributors. Could you send me some more details about this, as I’m very interested in this oppo...
A.
to ask for advice
B.
to explain an error
C.
to ask for a decision
D.
to ask for information
E.
to make a complaint
F.
to request help
G.
to confirm details
H.
to express thanks
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【单选题】“_____________________________” “Good morning. George Clancy’s office, please.” “One moment.”
A.
Hello?
B.
Good morning, Bright Lights Design.
C.
Sally speaking.
【单选题】当下列反应的容器的体积变化时,平衡基本不受影响的是:
A.
N 2 (g)+3H 2 (g) ⇌ 2NH 3 (g)
B.
H 2 O 2 (l) ⇌ H 2 O (l)+1/2O 2 (g)
C.
H 2 (g)+I 2 (s) ⇌ 2HI(g)
D.
N 2 (g)+O 2 (g) ⇌ 2NO(g)
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