回收式自身输血的副作用不包括（）。
A.溶血倾向
B.细菌感染
C.肾功能不全
D.暴发性肝炎
E.出血倾向
参考答案：D
根据情景选择正确答案。
1. 你送朋友礼物，说：[ ]
A. I hope you'll like it.
B. Thank you.
2. 朋友送你礼物，你应打开，并说：[ ]
A. It isn't nice. I don't like it.
B. Oh, it's so nice! I like it very much. Thank you.
3. 别人不会做某事或从没做过某事，你可以鼓励别人说：[ ]
A. Please have a try!
B. Let me have a try.
功率是表示物体______的物理量，一个物体做功的功率40W表示______．
