脚手架纵向水平杆接长宜采用对接,也可采用搭接,搭接长度不应小于500mm。
参考答案:错
If it is quite _____ to you, I will visit you next Tuesday.
[ ]
A. convenient
B. fair
C. easy
D. comfortable
乳前牙反最佳矫治年龄为().
A.1~2岁
B.3~5岁
C.6~7岁
D.8~9岁
E.无需矫治,待恒牙期再作矫治