搜题请搜索小程序“爱下问搜题”
问题 填空题

今年4月某天的最高气温为8℃，最低气温为2℃，则这天气温t℃的t的取值范围是______．

答案

因为最低气温是2℃，所以2≤t，最高气温是8℃，t≤8，则今天气温t（℃）的范围是2≤t≤8．

填空题

根据短文大意选择单词并用其正确形式填入空白处,使补全后的短文意思通顺,语法正确,结构完整.（5分）

walk      way     without     prevent     easy

Trees are useful in three important    1  .The most important way is that they  provide man with food , wood and other products. Trees provide food not only for man, but also for animals.  2   trees, many animals could not live on the earth. It’s not    3  for man to live on the earth, either.

The second important way is that trees give us shade(树荫). On a hot summer day, people are eager to have a rest under the shade of a tree after   4  a long way. You can imagine how important the shade of a tree is to man and animals.

The third important way is that trees help to   5   droughts and flood. However, in many parts of the world, man hasn’t realized it. He has cut trees down in large numbers. In the end, he finds that he has lost the best friends he had.
查看答案
单项选择题

嗜酸性粒细胞减少的原因是（）

A.伤寒初期

B.猩红热

C.支气管哮喘

D.银屑病

E.钩虫病
查看答案