单选:气瓶的()是检查气瓶充装气体种类的辨识标志。A.颜色标志;B.色环;C.钢印标志;D.形状。 题目分类:压力容器考试 题目类型:单选 查看权限:VIP 题目内容: 气瓶的()是检查气瓶充装气体种类的辨识标志。A.颜色标志;B.色环;C.钢印标志;D.形状。 参考答案:
教学材料:A:How do you make fruit salad B:First cut three bananas,three apples... 教学材料:A:How do you make fruit salad B:First cut three bananas,three apples... 分类:压力容器考试 题型:单选 查看答案
__________ finishes eating lunch last ought to wash the dishes.A.The person B.Wh __________ finishes eating lunch last ought to wash the dishes.A.The person B.Wh 分类:压力容器考试 题型:单选 查看答案