安全监测工（）执行交接班制度和填报签名制度。
A、严格
B、一定
C、可以不
参考答案：A
A: which dog is yours?
B: Look over there. The one _____. [ ]
A. with eyes widely open
B. has eyes open wide
C. with eyes wide open
D. has eyes widely open
（）通常以丙酮为载体，是一种易挥发的化学熔剂。
A.酒精
B.水晶甲液
C.洗笔水
D.乙醇
