低钾血症最早的临床表现()
A.肌无力
B.U波
C.厌食、恶心、呕吐
D.腹胀
E.腱反射减退
参考答案:A
如果把向东走2米记为﹣2米,则+3米表示( ).
—How long have you _____ this magazine?
—For a week. [ ]
A. bought
B. borrowed
C. kept
D. lent