题目内容

A/An ________ is used to control part of a screen, and can be reused between screens.

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There are two methods for getting a reference to the fragment manager, ____________and getSupportFragmentManager().

The ________ method gets called immediately after your activity is launched.

不可见轮廓线用____画出。

尺寸线和尺寸界限用____画出。

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