浮顶罐使用前应细致检查浮标是否在轨道上，导向架有无卡阻，（）_爱下问搜题

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问题单项选择题

浮顶罐使用前应细致检查浮标是否在轨道上，导向架有无卡阻，（）有无堵塞。

A、密封装置

B、顶部人孔

C、透气阀

D、浮舱

答案

参考答案：C

完形填空

初中的生活即将结束，学校决定为毕业班的同学们举办一个毕业晚会，请你拟定一份邀请函，邀请同学们参加。每空一词。

Invitation
How time flies! Junior high school life is coming to an end. We will have a graduation
小题1:       in the school hall this Saturday evening. It will start 小题2:     6:00
pm. We can sing, dance and play games. We will 小题3:       as many photos as we can to leave good memories.
Come and 小题4:      us! You will have a 小题5:        time!

解答题

若方程3x²-5x-2=0有一根是a，则6a²-10a的值是多少？