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【简答题】
流行病学的定义可概括为
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反馈参考答案：
举一反三
【单选题】已知折现率10%，递延1期，年金支付期数为2期，年金金额为10，那么该递延年金现值是（ ）。
A.
14.662
B.
15.432
C.
15.778
D.
16.019
【单选题】–She didn’t come to schoolyesterday, did she? –______, though she was not feeling well.
A.
No, she didn’t
B.
Yes, she didn’t
C.
No, she did
D.
Yes, she did
【简答题】不合法的、非法的 adj.
【单选题】–Why didn’t Mary come to John’s birthday party last night? –She ______ to, but her dad simply would not let her out so late at night.
A.
wants
B.
wanted
C.
has wanted
【简答题】丙酰卤的水解反应主要产物是( )
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