碾压机械的开行方式通常有( ) A．环行路线 B．进退错距法 C

搜题请搜索小程序“爱下问搜题”

问题多项选择题

碾压机械的开行方式通常有( )

A．环行路线

B．进退错距法

C．圈转套压法

D．大环行路线法

E．8字形路线法

答案

参考答案：B,C

解析：碾压机械的开行方式通常有：进退错距法和圈转套压法两种。

填空题

看图填空

Yesterday was March 8th. It was 1 Day. After school, Jack left school quickly. He went 2 in the supermarket.

He 3 some food and fruits, and then went home. When he arrived home, he began to do the 4 for his mother. At

first he 5 the house.Then he did some 6 for his mother. After he finished his housework, he sat down to wait for

his 7 . Ten minutes 8 , his mother went home after work When she came home, Jack said to his mother, " 9

women's Day! Mum. " His mother felt surprised and she was very impressed. She said to his son? " Thank you very

much. You're a good boy. I am 10 of you. " Then they began to have supper happily.

1. _____ 2. _____ 3. _____ 4. _____ 5. _____ 6. _____ 7. _____ 8. _____ 9. _____ 10. _____

单项选择题

男性，72岁，突发胸闷，呼吸困难，不能平卧，四肢厥冷，急诊心电图示广泛前壁心肌梗死。查体：血压60／40mmHg，心率128次／分。出现低血压的最可能的原因是（）

A.心源性休克

B.急性左心衰竭

C.低血容量性休克

D.迷走血管性休克

E.心律失常