搜题请搜索小程序“爱下问搜题”
问题 选择题

目前医院在体检抽血时普遍采用如图所示的真空采血管．使用时将导管一端的针头插入被检者的静脉，另一端的针头插入真空试管内，血液便会自动流入试管，此时血液是

[ ]

A．靠自身重力流入试管

B．被真空试管吸入试管

C．由血压压入试管

D．通过吸气把血液压入试管

答案

答案：C

填空题

根据首字母填写句中的单词。

1. I am d___________ to do better than Mike and I am sure I will.

2. I am not fully p__________ by the evidence, but I give in anyway.

3. They began the r__________ work at once, as soon as the earthquake happened.

4. It is not p__________ to talk with your mouth full.

5. I didn't r__________ you in your school uniform.

6. He doesn't like to s__________ the hotel room with a stranger.

7. I've been c___________ about you lately. How's everything going?

查看答案
多选题

地球同步卫星与静止在地球赤道上的物体比较，下列物理量相同的是（　　）

A．线速度

B．角速度

C．向心加速度

D．周期
查看答案