【判断题】当晶振 频率为 12MH z , 定时器 / 计数器 工作在方式 1 定时 模式 时,可 实现最长的定时时间为 65.536 ms 。 ( )
【单选题】What is TRUE of pressure/vacuum valves?
A.
They are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tank
B.
They should operate in advance of the pressure/vacuum breakers
C.
They should be kept in good working order by regular inspection and cleaning
【单选题】According to the talk, which of the following is true about its market?
A.
It's getting smaller every year.
B.
It's increasing rapidly.
C.
It's expanding only in Japan.
【简答题】PLC 按硬件结构分类,可以分为 和 两种。
【判断题】当定时 / 计数器工作在定时方式 1 的模式下,中断服务子函数中必须重新给寄存器装初值。
【简答题】持拍队员的训练方式主要有移动能力、弹跳能力、( )和配合。
【判断题】主动脉是体循环的动脉主干,主动脉由左心室发出。
【单选题】What eventually happened to the phone company?
A.
It became a huge company.
B.
It allowed smaller companies to offer service.
C.
It was taken over by the government.
【单选题】四王中最杰出的画家( ),自称“以元人笔墨,运宋人丘壑,而泽以唐人气韵”。