in class,in the class 和in the classroom三者区别?

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• 10道C++判断题1．使用关键字class定义的类中缺省的访问权限是私有(private)的.2．作用域运算符（：：）只能用来限定成员函数所属的类.3．析构函数是一种函数体为空的成员函数.4．构造函数和析构函数都不能重载.5．说明或定义对象时,类名前面不需要加class关键字.6．对象成员的表示与结构变量成员表示相同,使用运算符.或->.7．所谓私有成员是指只有类中所提供的成员函数才能直接使用它们,任何类外的函数对它们的访问都是非法的.8．某类中的友元类的所有成员函数可以存取或修改该类中的私有成员.9．可以在类的构造函数中对静态数据成员进行初始化.10．如果一个成员函数只存取一个类的静态数据成员,则可将该成员函数说明为静态成员函数.写出对的序号就行,要不回答太麻烦了
• 2.Saturday is the ______ day of the week.A.first B.second C.last D.third 3.Get up early,______ you'll catch the early bus.A.so B.and C.but D.or 这两道题答案写的是B和D,错了错了3.Get up early,______ you'll catch the early bus.A.so B.and C.but D.or 4.Hurry up,______ you'll be late for class.A.so B.and C.but D.or 3选B,4选D
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• THIS IS PICTURE ( )MY COMPUTER填词 On in between behinD under of next to还有几个WEI FANG IS ( )THE CLASSROOM( ) CLASS THREEmy books are( )the bookcasewhat's this( )english?is the baseball9 )the backpack.
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• 语法中,现在分词,过去分词作定语的用法!1-什么情况下分词不能与定语从句互换?我查到的例子中有这样一条规则：如主句谓语是现在时,从句谓语事过去时时.例如：The foreigner who visited our class yesterday is from Canada.(≠The foreigner visited our class yesterday is from Canada.)但是之后看的很多例句把这条推翻了,所以这条规则更详细一点说,是不是区别在延续性/非延续性动词上了?2-过去分词（不及物的）作定语表示完成,那么此时和现在分词的having done有什么区别?（除了having done不能作定语）,也就是说,过去分词表示的完成（have done）时态上怎么看?3很多语法书上写,特定的不及物动词可以有v-ed形式做定语,这个"特定"怎么定义?我怎么样就可以知道哪个可以哪个不可以?
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