躁狂症情绪表现为（）。
A.情感淡漠
B.情感低落
C.情感不稳
D.情感高涨
E.情感幼稚
参考答案：D
物体沿直线以速度v1走了x，又以同向的速度v2走了x，它在这2x位移中的平均速度是______．
选词填空。
1. What would you like (with, for) breakfast?
2. I'd like some cabbages (and, or) eggplants.
3. The fish (is, are) too salty.
4. I (can, would) like some carrots.
5. What do you (have, has) for lunch?
