学会做学习的管理者，首先应该[ ] A、学会管理知识 B、在学习上少花时间，提高

根据短文内容，判断下列句子的正误，正确的用“T”，错误的用“F”。

     There are many books for young readers. Some of these are for children from 12 to 18. Others are for

those who are under 12. There are even some books for babies.

     Books for young children use a lot of beautiful pictures. They are a big part of each book. So many

writers of children's books also draw the pictures. These writers make sure that their books are more than

just fun stories to read. They make them look good, too!

     Some children's books tell very old stories. Many have animals in them that talk and do things that people

do. Some of these animals might be bears. Others might be foxes. A little mouse and a big lion might even be

in the same story.

     Many books for very little children are all pictures. Others may have a word here and there. Books for

babies may have something to push that makes sounds. This kind of book may make animal sounds. Then

it may have a picture of the animal that makes each sound. It may also have its name. This way, the baby

gets to know what sounds some animals make.

( )1. We have many books for both teenagers and little kids.           

( )2. In children's books, animals can talk to readers like real people.

( )3. Some books-for babies have pictures with a few words.           

( )4. Babies can also learn something from books.                      

( )5. The passage is mainly about different books for people of all age.

气象上把最高气温高于（）的天气定义为高温天气。

A．20℃ 

B．25℃ 

C．30℃ 

D．35℃

液压介质有（）、乳化型和合成型三大类。

关于室间隔缺损的临床表现，以下哪项不常见（）

A.消瘦

B.乏力

C.气促

D.眩晕

E.多汗

国家规范规定，人工煤气、天然气的热值标准是多少？