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【单选题】
听句子,并选出与所听句子意思最相近的一句A.
He is a hard-working guy.
B.
His brother is a hard-working guy.
C.
Neither he nor his brother is working hard.
D.
Both he and his brother are diligent.
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举一反三
【简答题】当波长为 300 nm ( 1 nm=10 - 9 m )的光照射在某金属表面时,产生的光电子动能范围为 0 ~ 4.0 × 10 - 19 J 。此金属的遏止电压为| U a | = V ; 阈值 频率 ν 0 = Hz 。
【单选题】听力原文：W: You didn't care for that school, did you? M: I'll say I didn't. Q: What did the man mean? (4)
A.
He hadn't been there.
B.
He didn't like it.
C.
He didn't kill.
D.
He wasn't careful.
【单选题】Would you please say your number again? I didn’t just now.
A.
． put it down
B.
． put it up
C.
． put it out
D.
． put it off
【单选题】听力原文：M: You didn't say anything at yesterday's meeting. Don't you think it was a success? W: I was really fascinated by what every speaker said. Q: Why didn't the woman say anything at the meeting? (1...
A.
She didn't think it a success.
B.
She was listening too attentively to the speakers.
C.
She was puzzled by what the speakers said.
D.
She had nothing to say.
【单选题】听力原文：W: You didn't say anything at yesterday's meeting. Don't you think it was a success? M: I was really fascinated by what every speaker said. Q: Why didn't the man say anything at the meeting? (16)
A.
He didn't think it a success.
B.
He was listening too attentively to the speakers.
C.
He was puzzled by what the speakers said.
D.
He had nothing to say.
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【简答题】肠梗死A.梗死灶呈节段性 B.梗死易液化 C.梗死灶呈锥形 D.梗死灶呈不规则形 E.梗死灶为对称性 脾梗死A.梗死灶呈节段性 B.梗死易液化 C.梗死灶呈锥形 D.梗死灶呈不规则形 E.梗死灶为对称性 心肌梗死A.梗死灶呈节段性 B.梗死易液化 C.梗死灶呈锥形 D.梗死灶呈不规则形 E.梗死灶为对称性
【简答题】为什么一些细菌完成分裂的时间比细菌基因组的复制所需的时间要少?为什么在选择营养条件下，E.coli中可以存在多叉的染色体或多达4个以上的开环染色体拷贝，而正常情况下染色体是单拷贝的?
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