周一的开盘时间为().
A.周一早09:00
B.周一晚21:00
C.周五晚21:00
D.周二早09:00
参考答案:C
It is often said that _______ teachers have ______ very easy life.
A.不填;不填
B.不填;a
C.the;不填
D.the; a
判断如下化学方程式是否正确,若不正确请改正:
CO2 点燃 . C+O2______.