a fixed signal that lets engineers know if a train can enter a block. A: ABS (automatic block system) B: lock C: lock signal

进入华为交换机系统视图的命令是(____)。, A: system-view B: interface system-view C: system-enter D: enable

English teaching in China didn't enter into the formal educational system until the ______ century. A: late 19th B: B. early 20th C: mid-20th D: D. late 20th

I saw the boy_______ the classroom. A: enter into B: enter C: to enter into D: to enter

If heavy smoke is coming from the paint locker,the first firefighting response should be to（）. A: release the CO fiooding system B: open the door to evaluate of the fire C: enter and use a portable extinguisher D: secure the ventilatio

使用下列（）函数读取一个字符串。 A: input("Enter a string") B: eval(input("Enter a string")) C: enter("Enter a string") D: eval(enter("Enter a string"))

Two systems of weights and measures used in the U.S. are ______. A: the U. S. Customary System and the metric system B: the International System and the metric system C: the Imperial System and the metric system D: the Customary System and the Imperial system

插入分页符的快捷键是( ) 。 A: Ctrl+ Enter B: Alt+ Enter C: Shift+ Enter D: Enter

在Python中，通常使用下面_______语句接收从键盘输入的字符串。 A: input("Enter a string") B: eval(input("Enter a string")) C: enter("Enter a string") D: eval(enter("Enter a string"))

Starting system and ignition system belong to the electrical system？