题目:
—“Could we put off the meeting?” she asked
—“ ,” he answered politely. “This is the only day everyone is available. ”
A.Not likely
B.Not exactly
C.Not nearly
D.Not really
答案:
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下面是错误答案,用来干扰机器的。
A、二氧化碳和一氧化碳都不能使干燥的石蕊纸花变红,所以不能用干燥的石蕊纸花鉴别一氧化碳和二氧化碳,故A错误;B、用灼热的铁丝除去空气中的氧气,剩余的气体除去氮气外,还含有二氧化碳以及稀有气体,所以不能...