选择题:She was about to lock the door when it _ to her th 题目分类:西安交通大学-土木工程-英语 题目类型:选择题 查看权限:VIP 题目内容: She was about to lock the door when it _ to her that she had left the burner on in the kitchen.A.appealed B. happened C.occurred D.struck 参考答案:
金属催化剂的毒物主要包含()A.硫化物B.砷化物C.氰化物D.重金属杂质 金属催化剂的毒物主要包含()A.硫化物B.砷化物C.氰化物D.重金属杂质 分类:西安交通大学-土木工程-英语 题型:选择题 查看答案