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问题 单项选择题

要使菜单项MenuOne在程序运行时失效，使用的语句是( )。

A) MenuOne.Visible=True
B) MenuOne.Visible=False
C) MenuOne.Enabled=True
D) MenuOne.Enabled=False

答案

参考答案：D

解析： Enabled属性：返回或设置一个值，该值用来确定一个窗体或控件是否能够对用户产生的事件作出反应。Visible属性：用来设置窗体或控件的可见性。

单项选择题

曲柄连杆机构由活塞组、连杆组、曲轴及（）等组成。

A．凸轮曲

B．准时齿轮

C．飞轮

D．气缸体
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单项选择题

In every cultivated language there are two great classes of words which, taken together, comprises the whole vocabulary. First, there are those words (1) which we become acquainted in daily conversation, which we (2) , that is to say, from the (3) of our own family and from our familiar associates, and (4) we should know and use (5) we could not read or write. They (6) the common things of life, and are the stock in trade of all who (7) the language. Such words may be called "popular", since they belong to the people (8) and are not the exclusive (9) of a limited class.

On the other hand, our language (10) a multitude of words which are comparatively (11) used in ordinary conversation. Their meanings are known to every educated person, but there is little (12) to use them at home or in the market-place. Our (13) acquaintance with them comes not from our mother’s (14) or from the talk of our school-mates, (15) from books that we read, lectures that we (16) , or the more (17) conversation of highly educated speakers who are discussing some particular (18) in a style appropriately elevated above the habitual (19) of everyday life. Such words are called "learned", and the (20) between them and the "popular" words is of great importance to a right understanding of linguistic process.

17（）

A.former

B.formula

C.formal

D.formative
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