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【单选题】
在对20~25岁所有妇女进行的一项调查中发现,应用口服避孕药的妇女,子宫颈癌的年发病率为5/10万,未服用口服避孕药的妇女为2/10万。据此作出的口服避孕药引起子宫颈癌的推论是( )
A.
正确的
B.
不正确的,因为在其他有关因素方面,这两组可能有差异
C.
不正确的,因为没有对应用者和不应用者年龄分布方面可能存在的差异进行调整
D.
不正确的,因为需要用率而不是比率来支持这一推论
E.
不正确的,因为没有区分发病率和流行率
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参考答案:
举一反三
【单选题】有一种我们不认识的水果,能看到它鲜亮的颜色和特殊的形状,这种认识活动是( )
A.
感觉
B.
表象
C.
记忆
D.
思维
【简答题】Though it had promise, in the end the project failed for three main reasons: the cost of building the enormous machine; the complexity of working with wood; and Hughes’s perfectionist approach, ______...
【单选题】—Don' t you think it nec essary that he to Miami but to New York? —I agree, but the problem i s that he has refused to.
A.
will not be sent;
B.
not be sent;
C.
can not be sent;
D.
should not send;
【单选题】Thousands of people took part in the work when the Three Gorges project (三峡工程) _____.
A.
was built
B.
was building
C.
was being built
D.
had been built
【单选题】在编辑样条曲线时,以下哪项要使用控制柄的选项来控制? ( ) (A)
A.
在样条曲线上的一段一段的点
B.
完全弯曲的样条曲线
C.
完全张紧的样条曲线
D.
在多条样条曲线间产生连接的点
【单选题】Tom received an invitation from Carrol but he ______. A. refused to go to the party B. refused her C. refused her to the party D. refusing to go
A.
refused to go to the party
B.
refuse her
C.
refused her to the party
D.
refusing to go
【简答题】Thousands of people took part in the work when the Three Gorges project (三峡工程) _____.
【单选题】_______ him this time is difficult.
A.
To refuse
B.
Refusing
C.
Refuse
D.
Refused
【单选题】在编辑样条曲线时,以下哪项要使用控制柄的选项来控制? ( )
A.
在样条曲线上的一段一段的点
B.
完全弯曲的样条曲线
C.
完全张紧的样条曲线
D.
在多条样条曲线间产生连接的点
【单选题】The Three Gorges Project is a hydroelectric dam that spans the Yangtze River by the town of __________, in the Yiling District of Yichang, Hubei province.
A.
HUangniu Rock
B.
Sandouping
C.
Mt Maogong
D.
Xiling gorge
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