鉴别反应常采用多种条件提高选择性如加AgN03试液加酸,加热生成银镜的药物是
A.水杨酸
B.对乙酰氨基酚
C.三氯叔丁醇
D.异烟肼
E.丙磺舒
参考答案:D
---There's going to ______ a concert in the hall tonight.
---Yes, and the last performance will be given by Wang Fei.
A.have
B.give
C.play
D.be.
发动机缺少机油的危害?