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【单选题】
下列哪种核酸分子的空间结构呈三叶草型A.
DNA
B.
mtDNA
C.
tRNA
D.
rRNA
E.
mRNA
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举一反三
【单选题】I can ______ you my dictionary, but you can ______ it for only a week. [ ]
A.
borrow, return
B.
lend, borrow
C.
lend, keep
D.
lend, return
【单选题】酶不可逆抑制的机制是
A.
抑制剂与酶的活性中心以共价键结合
B.
抑制剂使酶蛋白变性
C.
抑制剂与酶的辅助因子结合
D.
抑制剂以次级键结合在酶活性中心外
E.
抑制剂与酶表面的极性基团结合
【单选题】—Can I _______ your dictionary? —Sorry, I'm using it; I can't _______ it to you. [ ]
A.
lend; lend
B.
borrow; lend
C.
borrow; borrow
D.
lend; borrow
【单选题】酶不可逆抑制的机制是
A.
使酶蛋白变性
B.
与酶的活性中心上的必需基团以共价键结合
C.
与酶的调节部位结合
D.
与活性中心的次级键结合
E.
与酶表面的极性基团结合
【单选题】Scatter图可用于
A.
2001年5种疾病发病率比较
B.
10个年龄组患病率比较
C.
身高和患病率的关系分析
D.
描述O型血者血红蛋白含量分布
E.
2001年到2010年某地结核患病率的变化
【单选题】I can lend you my bike, but you may not lend it to ______.
A.
other
B.
others
C.
the other
【单选题】---Can you lend me some money? I need it because my sick mother is waiting for an operation in hospital. ---_______. So come with me to fetch some in the nearest bank.
A.
I’m sorry to hear that.
B.
Of course you can.
C.
I hope you’ll be better.
D.
Never mind.
【单选题】听力原文：I can't lend you my bicycle, because it's already on loan to someone. Why can't I lend you my bicycle?
A.
Because someone else was using my bicycle.
B.
Because my bicycle was stolen.
C.
Because I don't want to lend my bicycle to anyone.
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