具有胃酸抑制作用的药物为
A.铝盐
B.西咪替丁
C.奥美拉唑
D.枸橼酸铋钾
E.克拉霉素
参考答案:B,C
If you are traveling ________ the customs are really foreign to your own,please do as the Romans do.
A.in which
B.what
C.when
D.where
智能变送器的量程修改是对存储器内的上限和下限进行修改,不需要()。