牙量相对大于骨量是毛氏错牙合哪一种
A.毛氏Ⅱ1B.毛氏Ⅰ2C.毛氏Ⅲ1D.毛氏Ⅱ2E.毛氏Ⅰ
参考答案:E
— Let's go to the museum.
— _________________.[ ]
A. Let's go to the amusement park
B. That's a good idea
C. I don't know
在井下绝对禁止打开矿灯电池盒或打开灯头。若强行打开势必损坏闭锁和矿灯,而且会()会引起瓦斯爆炸等重大事故。