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【单选题】
A dazzling white burner flame in the boiler furnace indicates _____.A.
proper combustion
B.
water in the fuel
C.
excess air
D.
cold fuel oil
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【简答题】The color TV set you bought ____________ (比不上我买的那台).
【单选题】Color TV was first shown in 1929. It took more than two decades, _____, until 1951, for color broadcasts to begin in the USA. [ ] A. though
B.
therefore
C.
otherwise
D.
anyway
【单选题】As for quality of this model of color TV sets, the ones made in China are by no means ______those imported.
A.
inferior than
B.
less inferior to
C.
less inferior than
D.
inferior to
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