直接写出得数． 550-280=700-550=690-280=390+451=

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问题解答题

直接写出得数．

550-280=

700-550=

690-280=

390+451=

430+350=

770-136=

答案

550-280=270；

700-550=150；

690-280=410；

390+451=841；

430+350=780；

770-136=634．

故答案为；270；150；410；841；780；634．

阅读理解

根据短文内容，判断句子正(T)误(F)。

This is my room. The books are in the bookcase. The picture of my family is on the wall. My

backpack is on the chair. And I have a baseball. It's on the floor, between the bookcase and the desk.

A computer is on the desk, Some CDs are behind (在……后面) the computer. And I have a cat. It's

on my bed.

( )1. I have some books. They are in the bookcase.

( )2. The picture of my family is on the table.

( )3. I have a baseball on the floor.

( )4. A sofa is in my room.

( )5. My cat is on my bed.

单项选择题

室性心动过速的心电图表现为QRS波群方向相互交替变换，这种室速称

A．阵发性室速

B．单形性室速

C．双向性室速

D．室性融合波

E．心室夺获