对首营品种应()
A.质量审核
B.专柜存放
C.定期养护
D.分开设置
E.逐批验收
参考答案:A
—What’s the noise? —Oh, I forget to tell you. The new machine .
A.has been tested
B.is tested
C.will be tested
D.is being tested
红外碳硫分析仪高频炉温度可达到()。
A、1100~1350℃
B、1800~2200℃
C、2000~3000℃
D、800度