使用砂轮机前,必须检查砂轮机有无裂损,防护罩是否坚固,研磨台间距是否在()以内。
A.2mm
B.3mm
C.5mm
D.10mm
参考答案:B
-- There will be a __________ TV broadcast of the singing competition “The Voice of China” tonight.
-- That’s great. I adore all of the singers.
A.lively
B.living
C.live
D.alive
首次认定四级及以上职业项目经理,担任项目经理负责过的申报项目还需满足哪些条件?