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【多选题】
属于表面分析方法,可能对镀金、包金饰品产生误判的方法有A.
电子探针法
B.
化学光谱法
C.
火试
D.
XRF法
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举一反三
【单选题】假定两个职工一个工作日可以生产200公斤大饼,六个职工一个工作日可以生产400公斤大饼( )
A.
平均可变成本是下降的
B.
边际产量比平均产量高
C.
劳动的边际产量是200公斤
D.
平均可变成本是上升的
【单选题】假定两个职工一个工作日可以生产200公斤大饼,六个职工一个工作日可以生产400公斤大饼
A.
平均可变成本是下降的
B.
平均可变成本是上升的
C.
边际产量比平均产量高
D.
以上说法全不准确
【单选题】听力原文：W: Let me get you some coffee or tea, or would you rather have something cold, like Coca Cola? M: Well, there's nothing like water when the weather's hot. Q: Which drink does the man prefer? (18)
A.
Coffee.
B.
Tea.
C.
Water.
D.
Coca-Cola.
【单选题】Which person would you help first?_______ D. Wang Feng who has broken her arm.
A.
Li Yan who has cut her foot on glass
B.
Xue Jin whose nose is bleeding
C.
Gao Yuan who is on the ground not breathing
D.
Wang Feng who has broken her arm.
【简答题】选择偏倚(selection bias)
【单选题】— Would you please tell me _______ ? —Yes, it’s over there .
A.
which season you like best
B.
when we shall visit uncle Li
C.
where the Students Cinema is
D.
who you are waiting for
【单选题】Mr Li, there is someone in the next room _____ would like to speak with you. [ ]
A.
he
B.
who
C.
which
D.
whom
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