题目内容

To my son, I am a1: a father he is2 listen to and a man3 the rules of grammar. And I got this4 because my student was unable to describe her feeling on her 5to Europe.However, it doesn't 6 to critize our students. They unfairly bear the bulk of the criticism for these 7 because there is a sense that they8. On one hand, they are misled by the9. On the other hand, school fails to 10 the essential framework of language, accurate grammar and proper vocabulary.Perhaps, language should be looked upon as a 11 and a 12 : often study the road map (check grammar) and13 the car engine (adjust vocabulary). Learning grammar and a good vocabulary is just like driving with a road map in a13 car.14 ,15 , and16 communication depends upon grammar and a good vocabulary, the two17 assets for students, but they are18 in schools.

查看答案
更多问题

断面比能最小时对应的水深为()?

A. 临界水深
B. 正常水深
C. 收缩水深
D. 无法确定

急流时水深一定小于临界水深,断面比能随水深减小而增大。

A. 对
B. 错

缓流时水深一定大于临界水深,断面比能随水深增大而增大。

A. 对
B. 错

过水断面具有的总能量E与断面比能Es有什么关系?

答案查题题库