人类目前所有的处境都是由什么所决定（）
A.自信心
B.信念
C.外在环境
D.心情
参考答案：B
My daughter cares more for new clothes than anything else in the world, so she is very _______ about what she wears.
A．special
B．strict
C．especial
D．particular
下列( )类或接口定义了线程同步与交互的方法。
A．Thread
B．Runnable
C．Object
D．ThreadGroup
