活动圆规锯适用于在较小的构件上开内小孔。
参考答案：错
_____ your son has no interest in piano ,there is no point pushing him to learn it.
A Now that B So that C Even if D As if
“青如天，面如玉；蝉翼纹，晨星稀；芝麻支钉釉满足”描述的是（）。
A.汝窑
B.钧窑
C.哥窑
D.建窑
