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问题 单项选择题

如果创建一个选择集，使选框所圈住及所接触的图形选中，应采用（）

A、使用一个窗口选择

B、交叉选择

C、在命令行输入CA

D、按shift键并使用一个窗口选择

答案

参考答案：B

单项选择题

窗体上有一个名称为Command1的命令按钮，其事件过程如下：
Private Sub Command1_Click()
x="VisualBasicProgramming"
a=Right(x,11)
b=Mid(x,7,5)
C=Msgbox(a,b)
End Sub
运行程序后单击命令按钮，以下叙述中错误的是( )

A．信息框的标题是Basic
B．信息框中的提示信息是Programming
C．C的值是函数的返回值
D．MsgBox的使用格式有错
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单项选择题

Even plants can run a fever, especially when they are under attack by insects or disease. But (1) humans, plants can have their temperature (2) from 3,000 feet away—straight up. A decade ago, (3) the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4) a quick way to take the temperature of crops to determine (5) ones are under stress. The goal was to let farmer (6) target pesticide spraying (7) rain poison on a whole field, which (8) include plants that don’t have the pest problem.

Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (9) to the eye. Mounted on a plane flown at 3,000 feet (10) , an infrared scanner measured the heat emitted by crops. The data were (11) into a color-coded map showing (12) plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13) would.

The bad news is that Paley’s company closed down in 1984, after only three years. Farmers (14) the new technology and long-term backers were hard (15) . But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16) into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17) 75 percent of agricultural land in the United States," says George Oerther of Texas A＆M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18) infrared crop scanning could be adopted by the end of the decade. But (19) Paley finds the financial backing (20) he failed to obtain 10 years ago.

4（）

A. put up with

B. came up to

C. came up with

D. stood up to
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