微合金化的合金元素通常包括（）。
A、Mn、Si
B、V、Nb
C、Cr、Mo
D、Mn、Ca
参考答案：B
锯削时工件一般应夹在台虎钳的______，锯缝线要与钳口侧面______。
The government has taken measures to _____ the high prices of daily goods to keep the market stable. [ ]
A. take down
B. bring down
C. hand down
D. tear down
