【11】 是窗体上用于显示数据、执行操作、装饰窗体的对象。
参考答案：控件
解析： 控件是窗体上用于显示数据、执行操作、装饰窗体的对象。
She ought to stop working. She has a headache because she ______all day long. [ ]
A. has been reading
B. had read
C. is reading
D. has been read
短路过渡适合于（）或需低热输人的情况下的焊接。
A.薄板
B.厚板
C.中厚板
