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【单选题】
关于电力拖动系统稳定性，下列说法正确的是A.
当电磁转矩和负载转矩相等的时候，系统处于稳定状态
B.
电力拖动系统稳定也就是电力拖动系统处于静止或匀速运转状态
C.
电力拖动系统稳定指的是当系统受到扰动，当扰动消失后，能够自动的恢复到原来的状态
D.
只要机械特性和负载特性曲线有交点，电力拖动系统就是稳定的
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【单选题】Which of the following is NOT mentioned as a consequence of lies on the resume?
A.
To dishonor the company concerned.
B.
To damage the employee's credibility.
C.
To drive the shareholder mad.
D.
To lead to the anger of co-workers.
【单选题】The Status of Women in Ancient Society In large part as a consequence of the feminist movement, historians have focused a great deal of attention in recent years on determining more accurately the sta...
A.
compare competing new approaches to understanding the role of women in ancient societies
B.
investigate the ramifications of Bachofen's theory about the dominance of women in ancient societies
C.
explain the burgeoning interest among historians in determining the actual status of women in various societies
D.
criticize the value of ancient myths in determining the status of women in ancient societies
【单选题】某温度时，向pH=6的蒸馏水中加入少量硫酸氢钠晶体，温度不变测得溶液的pH=2，下列说法不正确的是：
A.
此时溶液的c(H + )= 1×10 -2 mol·L -1
B.
溶液中水电离出的c(H + )= 1×10 -12 mol·L -1
C.
H 2 O的电离程度随温度升高而增大
D.
c(H 3 O + )> c(SO 4 2— )
【单选题】Which of the following is not mentioned by the author as a consequence of new technological developments?
A.
Older technologies die away.
B.
The quality of life is improved.
C.
Overall productivity increases.
D.
More raw materials become necessary.
【单选题】Large part as a consequence of the feminist movement, historians have focused a great deal of attention in recent years on determining more accurately the status of women in various periods. Although ...
A.
in completeness
B.
restricted accessibility
C.
difficulty of interpretation
D.
limited quantity
【单选题】某病人,流产后出现月经不调,月经期持续9-10天,基础体温呈双相型,疑诊为子宫内膜不规则脱落,为确诊需做诊刮,其时间约在( )
A.
月经周期的第5天
B.
月经的第1天
C.
随意刮宫
D.
经后10天
E.
经前3天
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