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不定项选择
插齿刀不同的端剖面是一个连续的变位齿轮。
A．正确
B．错误
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单项选择题
David Tebbutt is the founder of Computer town UK. Although many people see this as a successful attempt to bring people closer to the computer, David does not see it that way. He says that Computer town UK was formed for just the opposite reason, to bring computers to people and make them “people –literate”...People don't have to learn computer terms, but the experts have to explain in plain language. The computers are becoming “people- liberate”. We can infer from the text that "computer-literate" means _____ .
A、being able to afford a computer
B、being able to write computer programs
C、working with the computer and finding out its value
D、understanding the computer and knowing how to use it
单项选择题
马考勒久期是现金流到期时间的加权平均数，权重为现金流的现值。
A、正确
B、错误
单项选择题
According to an annual UC survey of first-year students, freshmen now list ____ as the most important reason to go to college.
A．learning vocational skills
B．getting a better job
C．learning about things that interest them
D．getting promotion easily
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