小儿内伤咳嗽最常见的病因是
A．阳常有余
B．阴常不足
C．瘀血内阻
D．痰浊内生
E．水饮内停
参考答案：D
It’s difficult for me to decide which one to choose, because ______ of them are good.
A．neither
B．both
C．either
D．each
IMARSAT-B SES不能完成（）.
A、电话通信
B、电话及传真通信
C、中高速数据通信
D、自动接受MSI
