其最佳方剂为( )
A．知柏地黄丸B．麦味地黄丸C．茜根散D．归脾汤E．无比山药丸
参考答案：C
They haven’t arrived yet but we _____ them at any moment.
A．are expected
B．have expected
C．are expecting
D．will expect
下列说法正确的是 ( )
A．1 g水中含有1 mol H2O
B．CO和N2的摩尔质量都是28
C．1 mol SO2的质量是64 g
D．CO和N2的摩尔体积都约为22.4 L·mol－1
