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【单选题】
对于对接焊缝,当焊缝与作用力间的夹角 θ 满足 tan θ ≤ ( ) 该对接焊缝的可不进行验算。
A.
1
B.
1.5
C.
2
D.
0.5
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【单选题】先将总体各个观测单位按某一标志顺序排列编号并分成数量相等的组,使组数与取样数相同,然后从每组中依事先规定的机械次序抽取对象,该取样方法是
A.
简单随机取样
B.
系统随机取样
C.
分层随机取样
D.
整群随机取样
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A.
普萘洛尔
B.
硝苯地平
C.
地高辛
D.
华法林
E.
阿司匹林
【简答题】完形填空(共20小题;每小题1.5分,满分30分) 请阅读下面短文,掌握其大意,然后从36~55各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该选项的标号涂黑。 We will meet a lot of crossings on the way of our lives.How to choose? The son of a brewer (酿造商), Jim Koch, ...
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A.
正确
B.
错误
【单选题】Jim studied ______ at college.
A.
public speaking
B.
communication
C.
business and management
D.
broadcasting
【单选题】In September 2012 unemployment was high and the Fed was concerned that the economy would re-enter a recession. Therefore the Fed announced it would ( ) its purchases of securities in an effort to ( ...
A.
decrease; keep the federal funds rate low
B.
increase; keep the federal funds rate low
C.
decrease; raise the federal funds rate
D.
increase; raise the federal funds rate
【单选题】Read the following article about whether recreational marijuana should be legalized and answer the questions.More than half of US adults, over 128 million people, have tried marijuana, despite it bein...
A.
Sequential pattern.
B.
Cause-effect pattern.
C.
Chronological pattern.
D.
Problem-solution pattern.
【单选题】先将总体各个观测单位按某一标志顺序排列编号并分成数量相等的组,使组数与取样数相同,然后从每组中依事先规定的机械次序抽取对象,这种取样方法是( )。
A.
简单随机取样
B.
系统随机取样
C.
分层随机取样
D.
整群随机取样
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A.
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B.
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C.
生殖道
D.
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【单选题】某患者于平卧时频发胸痛,心电图相关导联的ST段抬高,诊断为变异型心绞痛,应选下列哪种药治疗
A.
β受体阻断药
B.
钙拮抗药
C.
硝酸酯类
D.
阿司匹林
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