窗体的______方法可把窗体隐藏起来，但不从内存中卸载。
A．Hide
B．Close
C．Show
D．Load
参考答案：A
ack went to college last year, _______ to return home until he achieves his goal.
A．determined not
B．determining not
C．not determined
D．not determining
下列肝毒性最强的是（）
A.氟烷
B.甲氧氟烷
C.恩氟烷
D.异氟烷
E.七氟烷
