氯丙嗪可阻断的受体包括()
A.DA受体B.5-HT受体
C.M胆碱受体
D.a肾上腺素受体
E.甲状腺素受体
参考答案:C, D
A new school ______ in our town last year. [ ]
A. built
B. was built
C. builds
D. is built
测量工业企业厂界噪声应在工业企业边界线( )处进行。据初测结果,声级每涨落 ( )布一个测点。
A.1m,3dB B.3m,1dB C.2m,5dB D.5m,2dB