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【单选题】
在一项研究的最初检查中,人们发现30~44岁男女两组人群的冠心病患病率均为4%,于是,认为该年龄组男女两性发生冠心病的危险相同。这个结论()
A.
正确的
B.
不正确的,因为没有区分发病率与患病率
C.
不正确的,因为用百分比代替率来支持该结论
D.
不正确的,因为没有设立对照组
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【单选题】下图是新建的一个宏组1的设计视图,对该图所表达信息描述正确的是( )
A.
运行宏组1时,只能打开学生表
B.
运行宏组1时,可以打开学生表和课程表,但这两个表短暂显示后即被关闭掉
C.
运行宏组1时,可以打开学生表和课程表,学生表不会被关闭掉,但课程表短暂显示后即被关闭掉
D.
运行宏组1时,宏组1中的宏操作 CloseWindow 会将打开的学生表和课程表关闭掉
【简答题】I don't like to take . I like to be careful.(risk)
【简答题】A foreigner’s first impression of the US is likely to be that everyone is in a rush — often under pressure. City people always appear to be hurrying to get where they are going, restlessly seeking att...
【判断题】Worldwide, the automobile has allowed us easier access to far places. However, the average journey time has increased in large cities as a result of widespread automobile use. This is due to traffic ...
A.
正确
B.
错误
【单选题】以下根据图中天线方向图的信息,描述正确的是:()
A.
Kathrein739638类型天线,HPBW:H:120°,V:16°。
B.
Kathrein739638类型天线,HPBW:H:16°,V:120°。
C.
Kathrein739638类型天线,HPBW:H:16°,V:65°。
D.
Kathrein739638类型天线,HPBW:H:65°,V:16°
【单选题】I don't like to sit ___ Tom's right. I would like to sit ___ the back row. [     ]
A.
on; in
B.
in; on
C.
on; at
D.
at; on
【简答题】Sharks frighten most of us, but Daniel Weaver, a shark scientist, swims with them for a living! We asked him some questions about this unusual job. *So Daniel, what's it like to be a shark scientist? ...
【多选题】对图中工件定位信息描述 不 正确的是
A.
工件的自由度为1
B.
工件的自由度为0
C.
工件被完全定位
D.
工件移动自由度为3
E.
黄色箭头指的不是工件
F.
使用了6个点来确定工件的位置,工件完全定位
【单选题】This work places us in a double bind, for when it is seen in close up it has little form or coherence, only falling into place when we stand back.Choose a word from A, B, C, and D, which can best repl...
A.
tie
B.
dilemma
C.
confine
D.
limit
【单选题】用 C#编写的网页后台代码被保存在( )文件中
A.
.aspx
B.
.vb
C.
.cs
D.
.config
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