题型:选择题 for the free tickets,I would not have gone to the film so often.A.If it is notB.Were it notC.Had it not beenD.If they were not 查看答案
题型:多项选择题 实验室的微波炉使用时,应注意()。A、微波炉开启后,会产生很强的电磁辐射,操作人员应远离B、严禁将易燃易爆等危险化学品放入微波炉中加热C、实验用微波炉严禁加热食品D、对密闭压力容器使用微波炉加热时应注意严格按照安全规范操作 查看答案