第9题: [单项选择]A. Have a good rest. B. Take his temperature. C. Get medical advice. D. Look for a better doctor. 参考答案:C 答案解析:[解析] M: I think I’m not myself now. W: Well, you’d better go to the school clinic and have a
第19题: [单项选择]在流量测量方法中,()测量方法是将管道中连续流动的流体,按固定体积V0分隔后逐次排出流量计,以排出固定体积数为依据,测量体积数n,可以求得容积流量V=nV0;测量排放频率f可以求得瞬时流量q0=fV0。 A. 容积测量原理 B. 流速测量原理 C. 动量原理 D. 差压原理 参考答案:A