普萘洛尔主要阻断
A.β受体B.α受体C.N2胆碱受体D.N1胆碱受体E.M胆碱受体
参考答案:A
No matter ____ he is, he must ____ and don't use his cell phones in the class. [ ]
A. what; obey the rules
B. who; obey the rules
C. that; obey the rule
D. where; obey the rule
急性阑尾炎的主要症状是
A.畏寒、发热B.恶心、呕吐C.腹泻或便秘D.转移性右下腹痛E.食欲下降