原料中的氯化氢和脱氯剂中的有效金属组分进行反应,生成金属氯化物是()
A、易挥发的物质
B、不稳定的物质
C、易发生热分解的物质
D、稳定的物质
参考答案:D
Since you are tired, you'd better_____and have a good rest. [ ]
A. stop to study
B. stop study
C. stop studying
What’s the matter ________ Jody? She has a bad cold.
A.in
B.with
C.at
D.on