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【单选题】
听力原文：W: John certainly has been in a bad mood today. M: I'll say he has. Q: What does the man mean? (19)A.
John is always sad.
B.
He thinks the woman is right.
C.
He will talk to John.
D.
John is actually happy.
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【简答题】Excuse me, can you tell me the time, please?
【单选题】分析铁矿石铁含量,五次结果为73.27%、73.19%、73.06%、73.20%和73.24%,则测定结果的标准偏差为()。
A.
0.0021
B.
5.0E-4
C.
8.0E-4
D.
6.0E-4
【单选题】Excuse me. Can I open the window?
A.
a. can (ability)
B.
b. can (permission)
C.
c. can (what is possible)