关于F与G公式(FｏG)ｏH=Fｏ(GｏH),既然FｏG=/=GｏF那为什么(FｏG)ｏH=Fｏ(GｏH)?

What words the blend smog are formed？ A: smoke+log B: smoke+fog C: smike+fog D: smike+log

People are not allowed ____ in the cinema, but they will allow ____in the rest room. A: to smoke, smoke B: smoking, to smoke C: to smoke, smoking D: smoking, smoke

将烟雾探测器1连接到烟雾探测器2上 A: Attach smoke detector 1 to smoke detector 2. B: Glue smoke detector 1 to smoke detector 2. C: Join smoke detector 1 to smoke detector 2. D: Link smoke detector 1 to smoke detector 2.

______ is forbidden in the meeting-room but we are allowed ______ in the room for smokers. A: Smoking, smoking B: Smoking, to smoke C: To smoke, smoking D: To smoke, to smoke

fog的形容词

Fog will_____throughout the night.

They have made _______ a rule _________ in the room. A: this; not to smoke B: it; smoking C: it; to not smoke D: it; not to smoke

Radiation heat transfer of smoke tube boiler mainly occurs in , convection heat transfer mainly occurs in . A: Furnace and smoke pipe B: Smoke pipe and furnace C: Needle tube, smoke box D: Smoke box and smoke pipe

To give up _____ means _____ . A: smoking, stopping smoking B: smoking, to stop smoking C: to smoke, to stop to smoke D: to smoke, stopping to smoke