【简答题】MCS-51系列单片机的应用程序一般存放在( )中。A. 程序存储器ROM
【简答题】The author is ______ toward icebergs.
【单选题】Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes _____ .
【单选题】在【例1-1】中,C程序从( )函数开始运行。
【简答题】The icebergs are erous because they are hidden __ and can turn over unexpectedly.
【单选题】When operating in an area where sea ice and icebergs are present,which statement is TRUE? ()
A.
Icebergs may travel in a direction many degrees different from the sea ice
B.
Both icebergs and sea ice will move in approximately the same direction and at the same speed
C.
Icebergs and sea ice will move in the same direction,but at different speeds due to the sail effect of the berg
D.
Icebergs and sea ice will move in the same direction,but the iceberg will move slower because of its underwater bulk
【简答题】C程序运行时总是从____ 函数开始运行的。
【单选题】下列关于Modem说法中有错误的是()
A.
发端Modem的作用是把计算机发出的数字电信号调制成便于在电话线上传送的模拟电信号。
B.
收端Modem的作用是把从电话线上接收的模拟电信号解调成原来的数字电信号发给计算机。
C.
调制解调器(Modem)分为内置式和外置式。内置式Modem其实就是一块计算机的扩展卡,插入计算机内的一个扩展槽内即可使用,它无需占用计算机的串行端口。
D.
外置式Modem则是一个放在计算机外部的盒式装置,它需占用电脑的一个串行端口,不需要接单独的电源才能工作。外置式Modem安装和拆卸容易,还便于携带。