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【单选题】
【】下列哪些泵不可用作为消防泵?
A.
卫生水泵
B.
锅炉给水泵
C.
压载水泵
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皮皮学刷刷变学霸
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【判断题】根据F=ma 得到m=F/a,所以物体的质量跟物体所受的合外力成正比。
A.
正确
B.
错误
【单选题】Refer to Figure 1 The amount of the tax per unit is
A.
P 2 minus P 0 .
B.
P 2 minus P 1 .
C.
P 1 minus P 0 .
D.
Q 1 minus Q 0 .
【单选题】Refer to Figure 9-1. With trade, Scotland will
A.
export 11 units of wool.
B.
export 5 units of wool.
C.
import 15 units of wool.
D.
import 6 units of wool.
【单选题】Refer to Figure 1 The per-unit burden of the tax on sellers is
A.
P 2 minus P 0 .
B.
P 2 minus P 1 .
C.
P 1 minus P 0 .
D.
Q 1 minus Q 0 .
【单选题】Figure 1 The figure below depicts a production function for a firm that produces cookies. Refer to Figure 1 . As the number of workers increases,
A.
total output increases, but at a decreasing rate.
B.
marginal product increases, but at a decreasing rate.
C.
marginal product increases at an increasing rate.
D.
total output decreases.
【单选题】Refer to Figure 28-1. The labour force is
A.
134.0 million.
B.
92.3 million.
C.
139.7 million.
D.
98.0 million.
【单选题】患者,男性,45岁,囊尾手术后,平车运送回病房,需搬运患者至床上。平车放置的正确位置为
A.
头端与床尾呈钝角
B.
头端与床尾呈锐角
C.
尾端与床尾呈钝角
D.
尾端与床尾相接
E.
平车紧靠床边
【单选题】Refer to Figure 9-1. From the figure it is apparent that
A.
Scotland will export wool if trade is allowed.
B.
Scotland will import wool if trade is allowed.
C.
Scotland has nothing to gain either by importing or exporting wool.
D.
the world price will fall if Scotland begins to allow its citizens to trade with other countries.
【单选题】Refer to Figure 1 . With regard to cookie production, the figure implies
A.
diminishing marginal product of workers.
B.
diminishing marginal cost of cookie production.
C.
decreasing cost of cookie production.
D.
increasing marginal product of workers.
【单选题】Refer to the symbol in Figure1. When A = 0 and B = 1, ________.
A.
∑ = 1, Cout = 1
B.
∑ = 0, Cout = 1
C.
∑ = 0, Cout = 0
D.
∑ = 1, Cout = 0
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