【单选题】一Shall we buy some cards foe our teachers? 一Why not make some by ourselves? It will be much .
【单选题】听力原文:W: John, what game shall we arrange for the children to play? M: Why don't we leave that up to themselves? Q: What does the man advise the woman to do? (19)
A.
Leave the children at home.
B.
Arrange some games for the kids.
C.
Let the kids make their own amusement.
D.
Tell them to take some toys with them.
【判断题】对流传热的种类很多,按流动起因可分为强迫对流和自然对流;按流体有无相变可分为单相对流传热和相变对流传热;按流体的流态可分为层流、紊流和过渡流;按换热表面的几何形状分,可分为外掠平板强迫对流、管槽内强迫对流、外掠圆管强迫对流、外掠管束强迫对流、竖板自然对流、水平板热面向上自然对流、水平板热面向下自然对流、横管外自然对流、竖管外自然对流、水平夹层自然对流、竖夹层自然对流、膜状凝结传热、大容器沸腾等等。
【单选题】-Shall we buy some cards for our teacher? -Why not make some by ourselves? It will be much______
【单选题】一旦冷却水的流动达到湍流状态,冷却水便在管道内()运动。
【简答题】山脊的等高线应向____向凸出,山谷的等高线应向____方向凸出。
【单选题】-Shall we buy some cards for our teachers? -Why not make some by ourselves? It will be much________.
【简答题】情景交际。 A. Outside the park gate. B. Great. C. Let's make it a little earlier. D. Shall we go boating in the park? E. Where shall we meet? F. Nothing much. A: Hi, Jim! What are you going to do tomorrow?...
【判断题】山脊的等高线应向上坡方向凸出,山谷的等高线应向下坡方向凸出