【判断题】采用设施园艺生产可以增加播种指数或延长生产期,可以有效解决目前我国耕地不足的问题。( )
【判断题】如果所有轮胎的磨损均匀,就必需进行轮胎换位了。
【多选题】TCP/IP 协议栈中传输层的协议有( )
【多选题】TCP/IP协议栈中传输层的协议有()。
【单选题】听力原文: The world’s first completely automatic railway has been built under the busy streets of London. The railway is called the Victoria Line, and it is part of the complete London underground railway...
A.
The workers on the underground platforms were replaced by machines.
B.
It became the first completely automatic railway in the world.
C.
A completely automatic line was added to its network.
D.
Its trains became computer-controlled.