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【多选题】
在12色相环中互补色有哪几对?A.
红和绿
B.
C.
黑和白
D.
紫
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参考解析：
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皮皮学刷刷变学霸
举一反三
【判断题】If good 1 is measured on the horizontal axis and good 2 is measured on the vertical axis, and if the price of good 1 is p1 and the price of good 2 is p2,then the slope of the budget line is p2=p1
A.
正确
B.
错误
【判断题】If good 1 is measured on the horizontal axis and good 2 is measured on the vertical axis and if the price of good 1 is p1 and the price of good 2 is p2, then the slope of the budget line is -p2/p1.
A.
正确
B.
错误
【单选题】If the price is P 4 , the firm will earn profits equal to the area
A.
(P 2 -P 1 )*Q 2
B.
(P 3 -P 2 )*Q 3
C.
(P 4 -P 2 )*Q 4
D.
(P 4 -P 3 )*Q 3
E.
None of the above is true.
【简答题】如图所示刚架 EI = 常数,各杆长为 l ,杆端弯矩 M AB =________ 。
【单选题】A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.
A.
P2 equals P1
B.
P2 is zero
C.
P2 is much larger than P1
D.
P2 is much smaller than P1
【单选题】图示刚架，EI=常数，各杆长为l，A截面的转角为______。
A.
ql 3 /(24EI)(逆时针)
B.
ql 3 /(24EI)(顺时针)
C.
ql 3 /(12EI)(顺时针)
D.
ql 3 /(6EI)(逆时针)
【简答题】已知刚架的弯矩图如图所示，各杆EI=常数，杆长l=4m，结点B的转角qB为（ ）。【图片】
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