治风湿痹痛宜选
A.天麻B.地龙C.全蝎D.蜈蚣E.以上均是
参考答案:E
Can you tell me _______ in the future?[ ]
A. how life will be like
B. how will life be like
C. what life will be like
D. what will life be like
试说明继电器的选用原则。