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【判断题】
某汽车厂二期扩建工程，为加夜班浇筑上，安排电工将土搅拌机棚的三个照明灯接亮，当电工将照明灯接完线合闸试灯时，听见有人喊“电人了”立即将闸拉掉，可是手扶搅拌机位外倒土的倒地经医院抢救无效死亡。搅拌机开关箱的电源线是四芯电缆，其中零线已断掉，这个开关箱中照明和动力，N、PE混用。请判断下列事故原因分析的对错。事故的直接原因是搅拌机接地线（PE）与照明器工作零线（N）共用一条零线，而且已经断线。当三个照明灯接通电源后，因共用零线已断，相线经灯具和共用零线连通搅拌机外壳致使其带电，当开灯时，直接接触触电。A.
正确
B.
错误
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【简答题】c____ a.1.given free for people 免费赠送的 2.saying that youadmire sb. or sth. 赞美的;钦佩的
【单选题】In the figure given below, we see an expansion of the production-possibility curve (from PPC 1 to PPC 2 ). The two goods produced are wheat and cloth, which are land-intensive and labor-intensive resp...
A.
B.
C.
D.
D
【简答题】Each of the statements below is followed by four alternative answers. Choose the one that would best complete the statement. 1). A word is _______ of a language that has a given sound and meanin...
【单选题】锥形轴和轮毂之间的键连接常用 ________ 。 ( ) A . 花键连接 B . 半圆键连接 C . 平键连接 D . 楔键连接
A.
1
B.
2
C.
3
D.
4
【多选题】Fill in the blanks with the words given in the box. A.accumulated B. amount C. applies D. benefit E. deposit F. discount G. entitles H. multiple I. preference J. purchase 1. Due to these restrictions...
A.
F
B.
D
C.
J
D.
G
E.
H
F.
A
G.
I
H.
B
I.
E
J.
C
【单选题】In the figure given below AB is the production-possibility curve of Canada. In the absence of trade, the price ratio is 1 bushel of wheat/bale of cotton as shown by the line PQ. The international pric...
A.
a. a. 40 bushels of wheat.
B.
b. b. 20 bushels of wheat.
C.
c. c. 30 bales of cotton.
D.
d. d. 60 bales of cotton.
【单选题】In the figure given below AB is the production-possibility curve of Canada. In the absence of trade, the price ratio is 1 bushel of wheat/bale of cotton as shown by the line PQ. The international pric...
A.
a. produce at point S 1 and consume at point C 1 .
B.
b. produce and consume at point C 0.
C.
c. produce at point S 1 and consume at point C 0.
D.
d. produce and consume at point C1.
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