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【单选题】
关于列表框(ListBox)和组合框(ComboBox)的Items属性的说法，正确的是________。A.
该属性是一个一维字符串数组，数组的长度根据数据项决定，所以是可变的。
B.
该属性是一个一维字符串类型的数组，数组的长度是256。
C.
该属性是一个一维数组，数据类型可以自己定义。
D.
该属性是一个二维数组，数据类型是字符串类型。
E.
该属性是一个一维数组，可以用ReDim语句重新定义。
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【单选题】When are windows the weak link in a building？ A In the cold winter.
B.
In the hot summer.
C.
When air conditioners are turned on.
D.
Both A and B.
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A.
正确
B.
错误
【简答题】If the K-L integral Equation 10.5-3 has two solutions, φ 1 (t) and φ 2 (t) corresponding to the eigenvalues λ 1 and λ 2 , then show that if λ 1 ≠0 and λ 2 ≠λ 1 we must have (Hint: Substitute for φ 1 (...
【单选题】听力原文：F: When was the building built? M: It was built in 1909. When was the building built?
A.
1990.
B.
19091
C.
1919
【简答题】A A greenhouse is a building made of glass which is used for keeping plants warm when the outside temperature is how．In a similar way there are several gases in the atmosphere which trap(捕捉)the heat p...
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