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【单选题】
胎盘滞留是指胎儿娩出后多长时间,胎盘尚未娩出:A.
10分钟
B.
15分钟
C.
20分钟
D.
25分钟
E.
30分钟
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反馈参考答案：
举一反三
【单选题】How often does the group rehearse?
A.
Once a week.
B.
Twice a week.
C.
Three times a week.
D.
Three times a month.
【单选题】According to the author, what Franck Ketchouang wrote was______.
A.
silly
B.
simple
C.
remarkable
D.
disputable
【单选题】As mainstream chip production technology shifts from one generation to the next every three to five years, plants with new technology can make more powerful chips at lower costs,______plants with outd...
A.
because
B.
even though
C.
while
D.
since
【简答题】下列物质中: 1 金刚石 2 石墨 3 冰水混合物 4 纯净无污染的空气 5 红磷 6 白磷 7 过氧化钠 8 氧化钠 9 胆矾 CuSO 4 溶液 11氧化钙 属于混合物的是 ______ 属于单质的是 ________ ,属于化合物的是 ________ 。
【单选题】The tragedy of five construction workers is cited to prove that
A.
the bridge is a remarkable feat in itself.
B.
the bridge has seen many tragedies.
C.
challenges to build the bridge were tremendous.
D.
the authority employed unqualified workers.
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