一般防护用具不具有绝缘性能。
参考答案：对
—_____ do you read English every morning?
—For twenty minutes. [ ]
A. How often
B. How long
C. How soon
D. How much
解表药多入（）经。
A.肾
B.胃
C.肺、膀胱
D.大肠
