题目

The boy keeps coughing,and the doctor tells the parents it still needs more time to _____     the reason.     A.put off               B.figure out     C.make up             D.look through 答案:B 解析:    考查动词短语辨析。put off推迟,拖延;figure sth.out弄懂,弄清楚;make up编造;化妆;look through翻阅,翻找。分句句意为:要查明原因还需要更多时间。故选B项。用a、b、c表示三条不同的直线,y表示平面,给出下列命题:( )①若a∥b,b∥c,则a∥c;②若a⊥b,b⊥c,则a⊥c;③若a∥y,b∥y,则a∥b;④若a⊥y,b⊥y,则a∥b.A.①②B.②③C.①④D.③④
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