用压力表测得的数值是（）部分，这个值称为真空的多少。 A.大气压力低于表压力 B.绝
题型：单项选择题
问题：
用压力表测得的数值是（）部分，这个值称为真空的多少。
A.大气压力低于表压力
B.绝对压力低于表压力
C.绝对压力高于大气压力
D.绝对压力低于大气压力
题型：单项选择题
短文改错
Attention please,everyone.We have accepted the weather forecast on the radio this morning that there
will have a heavy rain tonight.Be sure shut the windows and doors until you leave your classrooms.The
sports 
meet that we planned to hold on tomorrow will be put off.After it becomes fine,we'll make other
announcement.We will have classes on Wednesday as usually.Since it is colder tomorrow,please dress on
more clothes in time.Those who comes to school by bike,don't keep your umbrella open while riding.
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