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
A: Furnace and smoke pipe
B: Smoke pipe and furnace
C: Needle tube, smoke box
D: Smoke box and smoke pipe
A
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举一反三
- 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
- 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
- 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
- I"d rather you ______ in bed. A: don"t smoke B: doesn"t smoke C: didn"t smoke D: not smoke
内容
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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
- 1
Do you mind my (smoke) ________here? A: smoke B: to smoke C: smoking D: smoked
- 2
As students, we ______. A: won’t smoke B: are not to smoke C: are not smoking D: don’t smoke
- 3
We do not permit ()in the office, so we do not permit him()_ here. A: to smoke; to smoke B: smoking; to smoke C: smoking; smoking D: to smoke; smoking
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I advised __________ ,but he turned me a deaf ear. A: him not to smoke again B: him to smoke not again C: him to not smoke again D: not him to smoke again