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【单选题】
妊娠期妇女易发生牙齿腭侧面酸蚀与的原因A.
激素改变引起组织反应改变
B.
妊娠及妊娠呕吐引起唾液PH值略有降低
C.
妊娠期期饮食的摄取数量和次数均增加
D.
体力下降，放松口腔卫生措施
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【简答题】A．Avoid big crowds where lots of people are coughing and sneezing. B．Have medicine. C．Go and see a doctor. D．Have rest and eat well.
【单选题】Lots of people go shopping on Saturdays and the shops are really ________.
A.
interested
B.
worried
C.
bored
D.
crowded
【简答题】Hardships sometimes may ______ the best in some people. A) turn out B) bring out C) go out D) run out
【简答题】A1 正骑跨中线。他接到位于后场的A2的传球。A1随后将球传回给仍然位于A队后场的A2。如何处理?
【简答题】阅读理解。 Tickets for the NBA basketball are going on sale (出售). Lots of people like to go to watch basketball. Most of them are going to cheer for their teams. However, there are never enough ticket...
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