单选:It was _______ who helped Tom out when he was in trouble. 题目分类:学历考试 题目类型:单选 查看权限:VIP 题目内容: It was _______ who helped Tom out when he was in trouble. A.IB.meC.usD.ours 参考答案:
带实心玻璃塞的及厚壁仪器烘干时,要注意慢慢升温,并且温度不可过高,以免烘裂。 带实心玻璃塞的及厚壁仪器烘干时,要注意慢慢升温,并且温度不可过高,以免烘裂。A.正确B.错误 分类:学历考试 题型:单选 查看答案