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【单选题】
Social insurance programs are:A.
government programs intended to protect families against economic hardships.
B.
private insurance policies to protect families from hardships caused by government actions.
C.
private insurance policies that cover gaps in government-provided health care.
D.
programs to help unemployed people have a social life.
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【单选题】Unlike the globe valve, gate valves give full bore flow without change of direction, such a valve is not suitable to partially open operationAccording to the above sentence, which of the following sta...
A.
The globe valve may be suitable for partially open operation
B.
The globe valve will give full bore flow with change of direction
C.
The gate valve gives full bore flow with change of direction
D.
The gate valve is suitable for full bore operation only
【简答题】程序里面其实“函数”已经够用了。为什么还要引入“类”?两者有什么异同?
【判断题】When compared to gate valves, globe valves have a much greater pressure drop across the valve.
A.
正确
B.
错误
【单选题】下面的选项中, 类选择器的基本语法格式正确的是( )
A.
类名{属性值1;属性值2;属性值3; }
B.
类名{属性1:属性值1,属性2:属性值2,属性3:属性值3}
C.
类名{属性1:属性值1; 属性2:属性值2; 属性3:属性值3;}
D.
类名{属性1:“属性值1”; 属性2:“属性值2”; 属性3:“属性值3”; }
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