单项选择题 The barman’s wife didn’t go to bed__________．A.because she was busy with her childrenB.because she wasn’t sleepy at allC.until two o'clock in the morningD.because her husband hadn’t finished working

不定项选择 鲍文反应原理说明从橄榄石到石英的矿物结晶温度依次升高。

判断题 微格教室一般用于师范院校的学生和在职教师教学技能训练的模拟教学活动。 A . 正确B . 错误