搜题请搜索小程序“爱下问搜题”
问题 填空题

一个圆柱体与一个圆锥体的底面积和高都相等．已知圆柱的体积是6立方米，那么圆锥的体积是______；如果圆锥的体积是6立方米，那么圆柱的体积是______．

答案

6÷3=2（立方米）；

6×3=18（立方米）；

答：已知圆柱的体积是6立方米，那么圆锥的体积是2立方米；如果圆锥的体积是6立方米，那么圆柱的体积是18立方米；

故答案为：2立方米，18立方米．

单项选择题

显性肺动脉高压的诊断标准是

A．静息时肺动脉平均压≥1.96kPa(20cmH2

B．运动后肺动脉平均压≥1.96kPa(20cmH2

C．静息时肺动脉平均压≥2. 7kPa(20mmH

D．运动后肺动脉平均压≥4.0kPa(30mmH

E．运动后肺动脉平均压≥2.7kPa(20mmH
查看答案
单项选择题

A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port （） to accomplish this. Another responsibility of a transport layer protocol is to create a （） and error-control mechanism at the transport level. TCP uses a sliding （） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

create a （） and error-control mechanism at the transport level.

A．procedure

B．function

C．route

D．flow
查看答案