血液可以看作是人体细胞与外界环境进行物质交换的媒介。 ( )

某32位操作系统的文件分配表如图1-3所示，对于文件1总共有（）个物理块。

A．3

B．4

C．5

D．7

教学

Inside the pleasingly fragrant cafe, So All May Eat(SAME) in downtown Denver ,the spirit ofgenerosityis instantly noticeable :donation box stands in place of a cash register. Customers here pay only what they can afford, no questions asked.A risky business plan, perhaps, but SAME Café has done one unchangeable thing in the Mile High City for six years: Open only at midday, the restaurant allows poor local customers who cannot pay to work as volunteers instead. They can act as waiters and waitresses, and dishwashers, or look after the buildings and equipment for the cafe.   

It’s based on trust, and it’s working all right”, says co-owner Brad Birky, who started the café in 2006.  Previously volunteering at soup kitchens, the Birkys were dissatisfied with the often unhealthy meals they served there. “We wanted to offer quality food in a restaurant where everyone felt comfortable, regardless of their circumstances,” Birky says. SAME’s special lunch menu changes

daily and most food materials are natural and grown by local farmers. The café now averages 65 to 70 customers (and eight volunteers) a day. And the spirit of generosity behind the project appears to be spreading. In early 2007,one volunteer who had cleared snow for his meals during t he long

winter said goodbye to the Birkys, He said he was going to New Orleans to help with the hurricane clearing up,” says Birky.

小题1:What can we learn about the soup kitchens the Birkys previously worked for?

A．They refused to have volunteers.

B．They offered low quality food.

C．They provided customers with a good environment.

D．They closed down because of poor management.小题2:According to the passage, which of the following is TRUE?

A．The customers who cannot pay can work as volunteers instead.

B．More volunteers will go to new Orleans for the hurricane cleanup.

C．Many new cafes will be opened to offer free lunches in the town.

D．The lunch menu has remained the same since the café was started.小题3:The author’s attitude towards running such a café is_______

A．unfavorable

B．doubtful

C．cautious

D．approving

来访者中心属于（）。

A.精神分析疗法

B.行为疗法

C.认知疗法

D.人本主义疗法。

设液压马达进油流量力Q（m³），排量为q（m³/r），容积效率为ηv，机械效率为ηm，其实际转速为（）r／min。

A.Qηvηm/q

B.60Qηvηm/q

C.60Qηv/q

D.60Qηv