问题 单项选择题

滚动条控件中,用来设置鼠标单击滚动箭头时滚动条移动的大小的属性是 ______。

A.Max

B.Value

C.LargeChange

D.SmallChange

答案

参考答案:D

解析:[评析] 滚动条控件(HScroll或者VScroll)的属性和事件: 属性 ①Value属性 Value属性对应于滚动框在滚动条中的位置,其值介于Min和Max属性值之间。当Value属性值等于Min属性值时,滚动框位于滚动条的最左端(水平滚动条)或最顶端(垂直滚动条);当Value属性值等于Max属性值时,滚动框位于滚动条的最右端(水平滚动条)或最底端(垂直滚动条), ②Min和Max属性 Min属性设置滚动框位于滚动条最左端或者最顶端时Value属性的值。Max属性设置滚动框位于滚动条最右端或者最底端时Value属性的值。 ③SmallChange属性 设置鼠标单击滚动箭头时滚动框移动的大小。 ④LargeChange属性 设置鼠标单击滚动箭头和滚动框之间的区域时,滚动框的移动大小。 事件 ①Scroll事件 拖动滚动框时,Scroll事件被触发。 ②Change事件 释放滚动框或者单击滚动条或滚动箭头时,Change事件被触发。

问答题 简答题
填空题

Part 4


Questions 26-45


·Read the following passage and decide which answer best fits each space.
·Forquestions26-45, markoneletterA, B, C or D on the Answer Sheet.
Both (26) and zoology are parts of a more general field of science, biology. The two are studies of (27) things, which share certain characteristics, (28) they are plants or animals. Botany deals with plants, whose organisms that can (29) their own food by the use of sunlight. Zoology on (30) hand, deals with animals, those organisms that cannot manufacture their own food and are thus dependent (31) plants for their food.
(32) plants and animals share many abilities, the extent (33) which plants can exercise some of those abilities is (34) . For example, both plants and animals need food, water, and warmth for growth, (35) plants can move to (36) those needs only by the slow extraction of their leaves and roots, while animals can move relatively (37) distances in relatively little time. When an animal is hurt with needle, the animal will (38) the part of the body (39) . This ability to draw back (40) pain or irritation, called irritability, is found only to a very limited extent in plants.
If plants (41) the same (42) as animals, animals would have had a more difficult time finding food. If animals were as limited as plants, they might (43) a means of manufacturing their own food, as plants do now. The world would be a very different place (44) it is if the characteristics of plants and animals were (45)

A.re-examined

B.revised

C.reversed

D.reviewed