阿贝折射仪是根据()现象设计的。
A.折射
B.反射
C.临界折射
D.全反射
参考答案:C
--- They are quiet, aren’t they? --- Yes. They are accustomed __________ at meals.
A.to talk
B.to not talk
C.to talking
D.to not talking
乙二醇罐标定下封头时,当液位0%时加水10T,乙二醇比重为1.1。那么乙二醇罐液位0%时,罐内乙二醇的量为()。
A、9T
B、10T
C、11T
D、12