题目

给3 ml液体加热,需使用的仪器有(    ) (1)试管(2)烧杯(3)试管夹(4)酒精灯(5)蒸发皿(6)石棉网(7)铁架台(带铁圈) A.(1)(3)(4)(5)B.(2)(4)(6) C.(1)(3)(4)          D.(2)(4)(6)(7) 答案:C9、Getting a right job can be difficult ____the students ___prepared to deal with the job interview. A.if ; won’t be                                           B.unless; are     C.unless ; will be                                        D.if;are
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