磁朱丸的功效是( )
A．益阴明日，镇惊安神
B．镇心安神，潜阳明日
C．镇心安神，滋阴潜阳
D．重镇安神，养血明日
参考答案：A
When I return to my hometown, I will call on Mr White who taught me ten years ago. The underlined part
means ______. [ ]
A. get back
B. give back
C. give out
D. go away
GB151-1999《管壳式换热器》中规定：固定管板或U型管换热器最外层换热管表面至壳体内壁的最短距离一般不小于（）ｍｍ。
A.6
B.8
C.10
