培养基pH下降到4.5以下为阳性的试验为()
A.甲基红试验
B.V-P试验
C.枸橼酸盐试验
D.吲哚试验
E.硝酸盐还原试验
参考答案:A
— I have a book.
— ____________[ ]
A. OK!
B. Me, too.
C. Here it is.
— Why is he feeling down today?
— Because the suggestion he________has been turned down. [ ]
A. put away
B. put up
C. put down
D. put forward