牛顿流体的t与du/dy成正比,那么t与du/dy成正比的流体一定是牛顿流体吗?
参考答案:
不一定,因为宾汉塑性流体的t与du/dy成正比,但曲线不通过原点。
—Is the H1N1 flu (流感) very serious now?
—No, I don't think so. However, we _______ need to be careful with it.[ ]
A. Also
B. neither
C. still
D. don't
甲氧氯普胺(胃复安)具有强大的中枢性镇吐作用,这是因为
A.阻滞了多巴胺受体B.激活了多巴胺受体C.阻滞了吗啡受体D.激活了吗啡受体E.阻滞了H1受体