单项选择题
1 Activity中如果加载多个Fragment，初始化显示第一个Fragment，请补全下面的代码？private void initFragment() { getSupportFragmentManager().（ ？）.replace(R.id.main_fm,new Fragment1()).commit(); }
A．Transaction（）
B．begin（）
C．beginTransaction()
D．getFrament()
1 Activity中如果加载多个Fragment，初始化显示第一个Fragment，请补全下面的代码？private void initFragment() { getSupportFragmentManager().（ ？）.replace(R.id.main_fm,new Fragment1()).commit(); }
A．Transaction（）
B．begin（）
C．beginTransaction()
D．getFrament()
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，而自漏极流出的
，则该管是 。单项选择题
In order to host Olympics, a city must submit a proposal to the International Olympic Committee (IOC). After all proposals have been _____, the IOC votes.
In order to host Olympics, a city must submit a proposal to the International Olympic Committee (IOC). After all proposals have been _____, the IOC votes.
A．supported
B．submitted
C．substituted
D．subordinated