Is Ann ________?[ ]
A. their friends
B. her friend
C. your friends
D. his a friend
答案:B
运费栏应填______。
A.502/25/1
B.502/25/2
C.0.25/1
D.此栏为空
反应胆道梗阻敏感性和特异性最好的酶是
A.ALPB.ALTC.ASTD.LDHE.CHE