【单选题】26 What are the author's present feelings about his or her children?
A.
Their behavior. is improving.
B.
They are approaching a difficult age.
C.
They don't spend enough time at home.
D.
They are choosing strange friends.
【判断题】异常波动是由系统性原因造成的质量数据波动。
【简答题】Unable to __________________ speak freely about his feelings,
【判断题】滴定时,左手可以离开活塞,放任溶液自己流下
【单选题】The young teacher made ________ silly mistake and out of _________respect for his feelings, I didn’t point it out in class.