A、 “力臂”是物体重心到基准面的水平距离。
B、 “力臂”是物体重心到参考面的垂直距离。
C、 “力矩”是物体中心到参考基准面的距离。
答案：A
A、 “力臂”是物体重心到基准面的水平距离。
B、 “力臂”是物体重心到参考面的垂直距离。
C、 “力矩”是物体中心到参考基准面的距离。
答案：A
A. 如果轮胎温度升高至超过 177 度,易熔塞熔化且轮胎放气。
B. 如果轮胎温度上升 177 度,易熔塞会熔化并导致轮胎泄气。
C. 当轮胎温度超过 177 度时,保险丝会熔化并导致轮胎漏气。
A. Adjust the frequency to the value giving in table 1.
B. Adjust the frequencyper the value given in table 1.
C. Adjust the frequency to the value given in table 1.
A. If necessary,prepare a gasket.
B. If necessary,add a pin.
C. Add a washer if necessary.
A. There are only four kinds of fasteners.
B. Fasteners is generally divided into four types.
C. We classify the fasteners through four dimensions in general.
A. The toxic conditions are given in Paragraph 2.0.
B. All the test result are given in Paragraph 2.0.
C. All the test conditions are given in Paragraph 2.0.
A. Do not reach this speed with a given flap setting.
B. Do not exceed this speed with a give flap setting.
C. Do not exceed this speed with a given flap setting.
A. 给出控制面板的原理图或图片。
B. 画出娱乐面板的示意图或图片。
C. 提供仪表板的图纸或图片。
A. When you try to change a word,make sure that the substitute you choose doesn't replace the meaning of the sentence.
B. Make sure that the chosen replacement word will not vary the implication of the sentence if you replace a word.
C. When you replace a word,always make sure that the alternative you select does not change the meaning of the sentence.
A. The equipment list shall include all needed or auxiliary equipment installed in the particular airplane when delivered.
B. All needed or optional equipment installed in the particular airplane when transported shall be contained in the equipment list.
C. The equipment list shall contain all required or optional equipment installed in the particular airplane when delivered.
A. 在本构型中,必须执行不同的测试程序。
B. 在本构型中,可以选用不同的测试程序。
C. 本次会议强制要求使用不同的测试程序。
