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【单选题】
下面关于索引的叙述中,错误的是( )。
A.
可以加快对表中记录的排序速度
B.
可以为所有的数据类型建立索引
C.
可以基于单个字段或多个字段建立索引
D.
可以提高对表中记录的查询速度
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参考答案：
举一反三
【单选题】某一正弦交流电波形如图所示,其瞬时值表达式为( )。
A.
V
B.
V
C.
V
D.
V
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【单选题】Neal：I expect you could do with a cup of tea，couldn’t you?Sally：__________have a cup of coffee，if you don’t mind．
A.
1 want to
B.
I'd rather
C.
I like to
D.
I love to
查看完整题目与答案
【单选题】— Sally, have you finished the project? — Not yet. — You've failed to do what you _____. Aren't you afraid your teacher will blame you? [     ]
A.
expected to
B.
were expected to
C.
will expect
D.
are expected
查看完整题目与答案
【单选题】Have you ever argued ________your friends，Sally？ [     ]
A.
to
B.
with
C.
from
D.
of
查看完整题目与答案
【单选题】I have made an ______ for you to see the doctor at eleven this morning.
A.
appointment
B.
arrangement
C.
opportunity
D.
assignment
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【简答题】味美思酒( 1.25 升零售包装)
查看完整题目与答案
【单选题】We don’t need heating system, ________.
A.
and nor we can afford it
B.
we don’t afford it
C.
nor can we afford it
D.
nor can’t it afford
查看完整题目与答案
【单选题】人类精子中含有的性染色体应为
A.
X染色体
B.
Y染色体
C.
X或Y
D.
X和Y
查看完整题目与答案
【简答题】Xiaoyan: I have most of the things I need.We don' t need to buy any rice, and we don't need any peas. Mary: We need some oranges.How many do we need to buy? Xiaoyan: Four are enough.And we need some c...
查看完整题目与答案
【单选题】如图所示,某正弦电流波形图,其瞬时值表达式为_____
A.
A
B.
A
C.
A
D.
A
查看完整题目与答案
相关题目：
【单选题】某一正弦交流电波形如图所示,其瞬时值表达式为( )。
A.
V
B.
V
C.
V
D.
V
查看完整题目与答案
【单选题】Neal：I expect you could do with a cup of tea，couldn’t you?Sally：__________have a cup of coffee，if you don’t mind．
A.
1 want to
B.
I'd rather
C.
I like to
D.
I love to
查看完整题目与答案
【单选题】— Sally, have you finished the project? — Not yet. — You've failed to do what you _____. Aren't you afraid your teacher will blame you? [     ]
A.
expected to
B.
were expected to
C.
will expect
D.
are expected
查看完整题目与答案
【单选题】Have you ever argued ________your friends，Sally？ [     ]
A.
to
B.
with
C.
from
D.
of
查看完整题目与答案
【单选题】I have made an ______ for you to see the doctor at eleven this morning.
A.
appointment
B.
arrangement
C.
opportunity
D.
assignment
查看完整题目与答案
【简答题】味美思酒( 1.25 升零售包装)
查看完整题目与答案
【单选题】We don’t need heating system, ________.
A.
and nor we can afford it
B.
we don’t afford it
C.
nor can we afford it
D.
nor can’t it afford
查看完整题目与答案
【单选题】人类精子中含有的性染色体应为
A.
X染色体
B.
Y染色体
C.
X或Y
D.
X和Y
查看完整题目与答案
【简答题】Xiaoyan: I have most of the things I need.We don' t need to buy any rice, and we don't need any peas. Mary: We need some oranges.How many do we need to buy? Xiaoyan: Four are enough.And we need some c...
查看完整题目与答案
【单选题】如图所示,某正弦电流波形图,其瞬时值表达式为_____
A.
A
B.
A
C.
A
D.
A
查看完整题目与答案
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