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【单选题】
面是有和外键之间关系的描述,请问哪些描述是正确的( )A.
一个表中最多只能有一个主键约束，多个外键约束
B.
一 个表中最多只能有一个外键约束，一个主键约束
C.
在定义主键外键时，应该首先定义主键约束，然后定义外键约束
D.
在定义主键外键时，应该首先定义外键约束，然后定义主键约束
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【单选题】It is said in Australia there is more land than the government knows ______. [ ]
A.
it what to do with
B.
what to do it with
C.
what to do with it
D.
to do what with it
【单选题】—How about having a picnic in the park on Sunday? — ___________ . Whatever you want to do is fine with me. [ ]
A.
You're welcome
B.
It's boring
C.
It's up to you
D.
It depends
【单选题】It’s said that in that area there is more land than the government knows ______.
A.
it what to do with
B.
what to do it with
C.
what to do with it
D.
to do what with it
【单选题】—What do you usually do after you have ______ breakfast on Sundays? —I usually play ______ soccer with my father.
A.
a ; /
B.
an ; /
C.
/ ; /
D.
/ ; the
【单选题】How do thermographic pictures indicate the temperatures of various parts of the body?
A.
With charts and graphs.
B.
With a thermometer.
C.
With different colors.
D.
With moving lights.
【单选题】The neighbors do not consider him quite _________ as most evening he awakens them with his drunken singing.
A.
respectful
B.
respectable
C.
respected
D.
respective
【单选题】小明学习认真,成绩优异,他被评为优秀学生。小明马上就要进入初中开始学习了,请问小明目前处于生涯哪个阶段呢?
A.
成长阶段
B.
探索阶段
C.
建立阶段
D.
维持阶段
E.
推出阶段
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