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【单选题】
减速手信号的显示和收回时机（）A.
看见列车头部灯开始显示，应待列车停车后方可收回
B.
进路准备妥当后在指定位置显示，在确认司机动车后方可收回
C.
看见列车头部灯开始显示，待列车头部越过信号显示地点后方可收回
D.
进路准备妥当后在指定位置显示，列车头部越过信号显示地点收回
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反馈参考答案：
举一反三
【单选题】Variables that are shared by every instances of a class are
A.
instance variables
B.
private variables
C.
public variables
D.
static variables
【单选题】Variables that are shared by every instances of a class are __________.
A.
instance variables
B.
private variables
C.
public variables
D.
class variables
【简答题】外生变量与内生量变(exogenous variables & endogenous variables)
【多选题】What are three influencing variables stood out among the variables mentioned in the related work? (More than one correct answer)
A.
Communication
B.
Coordination
C.
Motivation
D.
ThinkLet
【多选题】Which of the following statements about variables and their scopes are true?
A.
Instance variables are member variables of a class
B.
Instance variables are declared with the static keyword
C.
Local variables defined inside a method are created when the method is executed
D.
Local variables must be initialized before they are used
【单选题】All variables defined in a function are ()
A.
global variables
B.
Local variables
C.
Static variables
D.
Register variables
【判断题】Various types of variables include Class variables, Instance variables, Local variables, Static variables, Automatic variables.
A.
正确
B.
错误
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