“LXL”型水表，其中第三位字母“L”表示的是立式水表。
参考答案：错
— Why didn't you warn them of the danger ahead?
— But what otherwise? They never listen to me.
A. could I do
B. should I do
C. could I have done
D. must I have done
具有免疫抑制疗效的微生物制剂是（）
A.左旋咪唑
B.环磷酰胺
C.卡介苗
D.FK-506
E.胸腺肽
