以下关键字不能用来声明类的访问权限的是( )。
A.public B.staticC.protected D.private
参考答案:B
Music should be taught routinely in schools because of the benefits ______ can have on the development of the brains of young children.
A.which
B.that
C.it
D.one
不等速万向接头的转动波变化由两个万向接头来抵销,因此两个万向节端叉必须装置成()
A.互成60度
B.互成45度
C.同一平面
D.互相垂直