辨证为
A．痰阻心脉
B．水饮凌心
C．肝火扰心
D．痰热瘀结
E．痰火扰心
参考答案：E
It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be
very cold. [ ]
A. can
B. must
C. will
D. shall
（）灯具用于大量粉尘和潮湿的场所。
A.开启型
B.封闭型
C.密封型
D.防爆型
