尿糖检查最佳防腐剂是
A. 甲苯(二甲苯)
B. 甲醛
C. 麝香草酚
D. 浓盐酸
E. 碳酸钠
The riots were ________ off by the arrest of a local leader.
A. set
B. got
C. sparked
D. went
David slammed on the brakes and the car ________.
A. began to work
B. hit the road
C. set out for the journey
D. came to a halt
No sooner________ finished his talk than________ surrounded by the workers.
A. he had; was he
B. had he; was he
C. he had; he was
D. had he; he was
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