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【单选题】
收缩压相当于心动期中何时动脉内的压力?
A.
等容收缩期
B.
快速射血期
C.
减慢射血期
D.
快速充盈期
E.
减慢充盈期
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【单选题】News Report 3 Question 1
A.
B.
C.
D.
D
【单选题】NEWS REPORT 3 1 What’s the news report mainly about? A . Changes in romantic relationships. B . Development of the Internet. C . Changes in the ways of dating. D . Development in smartphones .
A.
B.
C.
D.
D
【单选题】Listen to understand News report 3 1
A.
1.
B.
2.
C.
3.
D.
4.
【单选题】NEWS REPORT 3 1 What did the African university leaders meet to discuss? A . Economic development problems. B . Problems higher education is facing. C . Problems such as war, famine and poverty. D . E...
A.
B.
C.
D.
D
【单选题】已知25℃时电对MnO4-+8H++5e-=Mn2++4H2O的Eθ=+1.51 V,若此时H+浓度由1mol.dm-3。变为1×10-4 mol.dm-3,则该电对的电极电势变化值(V)为 ( )
A.
上升0.38
B.
下降0.38
C.
上升0.24
D.
下降0.24
【判断题】液压泵是供油系统的主要部件
A.
正确
B.
错误
【单选题】NEWS REPORT 3 1 What does the study show about Generation Y? A. They occupy over a third of the Indian workforce. B. They are graduates from top colleges. C. They are keen on starting their own busine...
A.
B.
C.
D.
D
【单选题】某零件调质处理后硬度偏低, 补救的方法是:
A.
重新淬火后, 选用低一点温度回火;
B.
再一次回火, 回火温度降低一点;
C.
再一次回火, 回火温度提高一点;
【单选题】News report 3 1. What does a recent stu dy find about older people?
A.
Their mental skills decrease as they get older
B.
 Their mental skills can be improved through training
C.
 Their physical and mental health improves through training
D.
 Their mental skills will remain stable during training
【单选题】已知 E θ ( MnO 4 — /Mn 2+ ) =1.51V , E θ ( Fe 3+ /Fe 2+ ) =0.77V , 则反应 MnO 4 — +5Fe 2+ +8H + =Mn 2+ +Fe 3+ +4H 2 O 的平衡常数为 ( )
A.
320.0
B.
3.4 × 10 12
C.
5.2 × 10 62
D.
4.2 × 10 53
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