问题 单项选择题

下列关于表单事件的说法中,不正确的是______。

A.在表单对象的Init事件代码中能够访问它所包含的所有控件对象

B.在表单对象的Destroy事件代码中能够访问它所包含的所有控件对象

C.在表单对象的Load事件代码中能够访问它所包含的所有控件对象

D.在表单对象的UnLoad事件代码中不能够访问它所包含的所有控件对象

答案

参考答案:C

解析:[分析] 各事件的发生场合及含义如下:
Init事件:在对象建立时引发。在表单对象的Init事件引发之前,将先引发它所包含的控件对象的Init事件,所以在表单对象的Init事件代码中能够访问它所包含的所有控件对象。
Destroy事件:在对象释放时引发。表单对象的Destroy事件在它所包含的控件对象的Destroy事件引发之前引发,所以在表单对象的Destroy事件代码中能够访问它所包含的所有控件对象。
Load事件:在表单对象建立之前引发,即运行表单时,先引发表单的Load事件,再引发表单的Init事件。
Unload事件:在表单对象释放时引发,是表单对象释放时最后一个要引发的事件。例如,在关闭包含一个命令按钮的表单时,先引发表单的Destroy事件,然后引发命令按钮的Destroy事件,最后引发表单的Unload事件。

单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A.fundamental

B.comprehensive

C.equivalent

D.hostile

单项选择题