红霉素最常见的不良反应是
A．胃肠道刺激症状
B．肝脏损害
C．皮疹
D．药热
E．肾脏损害
参考答案：A
我国期货服务机构有（）。
A.居间人
B.期货信息资讯机构
C.期货保证金存管银行
D.期货交割仓库
The number of people invited __________fifty, but a number of them__________ absent for different reasons.
A．were; was
B．was; was
C．was; were
D．were; were
