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【单选题】
患儿,女,10个月。喘息性支气管炎,口唇轻庋发绀,该患儿最适宜的给氧方法是A.
鼻塞法
B.
氧气枕法
C.
鼻导管法
D.
面罩法
E.
头罩法
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【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
【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
【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】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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