【单选题】–Don’t put the waste on the ground, young man. --Oh, I’m sorry. I ____ the dustbin there.A.didn’t
A.
10.–Don’t put the waste on the ground, young man. --Oh, I’m sorry. I ____ the dustbin there. A.didn’t see
【单选题】— Why don't you take the T-shirt, Linda? — I have only $10. I can't ____ it. [ ]
【简答题】----Don’t be late for school next time,_______?----_________.A. will you; Yes, I won't B. will you; No, I won't C. do you; Yes, I will D. do you; No,I won't.
【单选题】江西诗派“一祖三宗”中的“一祖”指的是谁?
【简答题】299k的纯水以0.65m/s的流速流过一水平放置的苯甲酸固体平板(板前缘光滑,对流动没有扰动),其长为1m。已知临界雷诺数为5×10 5 ,299k时水的物性参数为密度996.7kg/m 3 ;动力黏度为0.8737×10 -3 Pa.s;苯甲酸在水中的扩散系数为1.24×10 -9 m 2 。 求:苯甲酸平板上的平均对流传质系数。