诊断肝癌最重要的化验是
A．乳酸脱氢酶B．丙氨酸氨基转移酶C．三酰甘油D．甲胎蛋白E．磷酸酶
参考答案：D
Most Americans would prefer to keep their problems _____ themselves and solve their problems _____
themselves. [ ]
A. to, by
B. by, to
C. for, to
D. in, on
用于将屏幕上的对象分组的控件是（ ）。
A． 列表框
B． 组合框
C． 标签
D． 框架
