【简答题】一台并励直流电动机的额定数据为: P N =17kW , U N =220V , I N =92A , R a =0.08Ω , R f =110Ω , n N =1500r/min ,试求:(20分) ( 1 )额定负载时的效率; ( 2 )额定运行时的电枢电动势 E a ; ( 3 )额定负载时的电磁转矩。
【单选题】CPA在审计过程中,根据获取的审计证据,得出财务报表整体存在重大错报的结论时,应当在审计报告中发表()。
【判断题】c标注半径,直径和角度,尺寸起止符号不用45度短划,而用箭头表示
【单选题】使用中国银行的网上银行时,需要插入U盾进行身份认证,这种身份识别手段属于
【单选题】The author's purpose in citing those who are repeatedly unemployed during a twelve-month period is most probably to show that ______.
A.
there are several factors that cause the payment of low wages to some members of the labor force
B.
unemployment statistics can underestimate the hardship resulting from joblessness
C.
recurrent inadequacies in the labor market can exist and cause hardships for individual workers
D.
a majority of those who are jobless at any time does not suffer severe hardship
【单选题】Part II Listening Comprehension (25 minutes) Section A Directions: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the ...
A.
Land a space vehicle on the moon in 2019.
B.
Design a new generation of mobile phones.
C.
Set up a mobile phone network on the moon.
D.
Gather data from the moon with a tiny device.
【单选题】Part II Listening Comprehension (25 minutes) Section A Directions: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the ...
A.
The International Labour Organization's key objective.
B.
The basic social protection for the most vulnerable.
C.
Rising unemployment worldwide.
D.
Global economic recovery.
【单选题】下列句子使用的标点正确的一项是
A.
夷人,现在因为想去取法,姑且称之为外国,他那里,可有较好的法子么?可惜,也没有。
B.
这么多年代,怎么能被压缩成一天呢!当然是通过博物馆。
C.
文学是灯,这说法真的有些冒险吧!但想到任何同创造有关的活动都有冒险的因素,我也就不打算改口了。
D.
最古怪的是在万人会场里挤满了人,等某位明星上台去讲几句话,然后疯狂地鼓掌。这使我想起了“文革初”的某些场景。