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问题 解答题
拖拉机耕地，第一天耕了
1
4
，第二天又耕了余下的
1
3
，最后还剩下3.6公顷，这块地原来有多少公顷？
答案

3.6÷[1-

1
4
-（1-
1
4
）×
1
3
]

=3.6÷[1-

1
4
-
3
4
×
1
3
]，

=3.6÷[1-

1
4
-
1
4
]，

=3.6÷

1
2
，

=7.2（公顷）．

答：这块地原来有7.2公顷．

单项选择题

在其他因素相同的情况下，当债券的市场利率下降时，债券价值将相应（）。

A.上升

B.下降

C.不变

D.不确定
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单项选择题

An instruction is made up of operations that (68) the function to be performed and operands that represent the data to be operated on. For example, if an instruction is to perform the operation of (69) two numbers, it must know (70) the two numbers are. The processor’s job is to (71) instructions and operands from memory and to perform each operation. Having done that, it signals memory to send it (72) instruction.

A．when

B．where

C．who

D．which
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