下面是实验室可制取氨气的装置和选用的试剂,其中错误的是
A.只有 ③
B.只有④
C.①②
D.①②④
答案:A
下列词语中书写无误的一组是()
A.歆享装饰理睬雕粱画栋
B.惫懒僚倒俨然少不更事
C.蹙缩反溃驯熟弱不经风
D.脊髓庠序猿猱白浪滔天
___we have satisfied you, you have no grounds of complaint.
A.So
B.Since that
C.Now that
D.By now.