美国有关规范房地产经纪人的法律中最严密的法令是（）。
A.一般代理法规
B.契约法规
C.各州的执照法
D.联邦法
参考答案：C
根据句意及首字母填空。
1. I i_____ many friends to my party.
2. May I u_____ your Walkman? Mine doesn't work.
3. I'm going to have an important m_____.
4.—What do you do after you get up every day?
—I brush my teeth and w_____ my face.
5. It's dirty here. Could you please s_____ the floor?
扩张型心肌病的病理生理改变为（）
A.心室舒张功能减低
B.心房舒张功能减低
C.心脏射血分数及心排血量下降
D.心室排血受阻，导致"泵"功能不良
E.继发心肌损害，致"泵"功能不良
