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问题 填空题

如图，△ABC沿BC方向平移得到△DEF，CE=2，CF=3，则平移的距离是______．

答案

∵△ABC沿BC方向平移得到△DEF，

∴平移的距离等于BE或CF的长，

∵CF=3，

∴平移的距离为3．

故答案为3．

单项选择题

某6m跨大梁采用C20混凝土，底模的拆除应在构件达到（）强度。

A、10MPa

B、12.5MPa

C、15MPa

D、20MPa
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单项选择题

In order to increase revenues, an airport plans to change the parking fees it charges at its hourly parking lots. Rather than charging $2.00 for the first two-hour period, or part thereof, and $1.00 for each hour thereafter, the airport will charge $ 4.00 for the first four-hour period, or part thereof, and $1.00 for each hour thereafter.
Which of the following is a consideration that, if true, suggests that the plan will be successful in increasing revenues

A．Very few people who park their cars at the hourly parking lot at the airport leave their cars for more than two hours at a time.

B．Over the past several years, the cost to the airport of operating its hourly parking facilities has been greater than the revenues it has received from them.

C．People who leave their cars at the airport while on a trip generally park their cars in lots that charge by the day rather than by the hour.

D．A significant portion of the money spent to operate the airport parking lot is spent to maintain the facilities rather than to pay the salaries of the personnel who collect the parking fees.

E．(E) The hourly parking lots at the airport have recently been expanded and are therefore rarely filled to capacity.
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