抹半圆形灰线如在半圆的______固定一根横档,找出中心点,再将活模钉在______上,将活模______扯动,从而扯制成灰线。
参考答案:半径上;中心点;来回绕半径
You can imagine what great trouble we had ______ the new school.
A.setting up
B.to set up
C.set up
D.to setting up
首选放射治疗的是
A.ASB.AIC.TOFD.PSE.MS