小容量注射液联动线验证,是否任何规格安瓿都要做?(FL1)
参考答案:
规格不同,模具不同,运行速度不同,原则上均应分别验证。
It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
A.other than
B.or rather
C.rather than
D.more than
PDC钻头破岩的主要机理为:()。
A、刮剂
B、压碎地层
C、冲击地层
D、切削地层