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问题 单项选择题

下列哪项是青春期开始的重要标志

A．出现周期性排卵

B．第一次来月经

C．卵泡开始发育

D．第二性征开始出现

E．体格发育第二高峰出现

答案

参考答案：B

填空题
用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。
welcome, to, surprise, show, that, friend, idea, say, for, time
       Manners are important in every country, but people have different   1   bout their manners. What is
good in one country may not be   2    in another.
       Chinese people are   3   to know the fact that an Englishman doesn’t stop to talk and shake hands
with his friend in the street. They just say hello   4   each other and then pass on.
       English people think   5   we Chinese end our visits to friends all of a sudden. They usually begin
to  6    that they want to go 15 or 20 minutes before they leave their   7    house. And they do this two or
three   8   within 20 minutes.
       It is important   9   people to understand each other. Here is a   10  , "When in Rome, do as the
Romans do."
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填空题

某数据库中有表Table_Good(GoodsID，GoodsNarne，SaleUnitPrice)和表Table_GoodsClass (CoodsClassID，CoodsClassNatne，Sum)，对家用电器类商品进行分类显示，如果商品的单价高于3000，则显示‘高档商品’；如果单价在1000—3000，则显示‘中档商品’；如果单价低于1000的显示‘低档商品’。完成下列的SQL语句。
SELECTGoodsName，SaleUnitPrice，Type=
CASE
(2)
(3)
(4)
END
FROM (5)
ON (6)
WHERE GoodsClassName=‘家用电器’
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