总结是针对以往某项工作或某一阶段工作的认识,内容有()。
A、回顾和评价
B、提高理性认识
C、判明得失利弊
D、找出经验教训
参考答案:A, B, C, D
Write a passage of at least 50 words on the topic “ Trees are important”. ( 以“树是重要的”为题写一篇不少于50个词的短文,标点符号不占格。)
Use the following points as a reference.(以下问题仅供参考)
Why trees are important?(Give at least three reasons)
What would happen without trees?
How can we protect trees?
成人脑脊液总量约为()
A.10~20 ml
B.20~40 ml
C.40~60 ml
D.60~100 ml
E.125~150 ml