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【单选题】
下面对索引的相关描述正确的是: ( )A.
经常被查询的列不适合建索引
B.
是外键或主键的列不适合建索引
C.
列值唯一的列适合建索引
D.
有很多重复值的列适合建索引
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【单选题】Responsibility for family is ________ happiness exists when you think of your parents and children.
A.
which
B.
what
C.
where
D.
whether
【简答题】Though your parents probably meant to have your name last a lifetime, remember that when they picked it they’d hardly met you, and the hopes and dreams they cared for when they chose it may not match ...
【简答题】What should you do when your parents become angry? If your 76. _______ parents got mad, try to have a conversation with them 77. _______ about it. Remembering not to shout at them. They u...
【简答题】When your parents advise you to “get an education” in order to raise your income, they tell you only half the truth. What they really mean is to get just enough education to provide manpower（人力资源） for...
【单选题】When was it _____ your parents took you to Hangzhou?
A.
before
B.
if
C.
which
D.
that
【简答题】When your parents advise you to 'get an education' in order to raise your income, they tell you only half the truth. What they really mean is to get just enough education to provide manpower for your ...
【单选题】. When your parents haven’t ____your letter for a long time,they will worry about you.
A.
heard
B.
heard from
C.
received
D.
accepted
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