在网络地址178.15.0.0中划分出10个大小相同的子网，每个子网最多有___(

Last year, some groups of students in their community (社区) made a survey about “How do people spend their free time? ” The following diagrams(图表) show some results of it:

Diagram (1): Hours for people of different ages who surf the Internet in a week.

Diagram (2): Different days people go to the library. (library attendance出席)

Diagram (3): Different programs people like.

小题1:People aged     spend the most time surfing the Internet every week.

A．7—16

B．17—30

C．31—55

D．over 56小题2:How many people go to the library on Saturdays?

A．About 20%.

B．About 40%.

C．Over 60%.

D．More than 80%.小题3:The three diagrams show us the results of a survey about    .

A．what people do every day

B．people’s different habits

C．people’s different lifestyles

D．how people spend their free time

易于生风的邪气是（）

A.风

B.寒

C.湿

D.燥

E.火

“求之不得，寤寐思服”的“思服”就是“（）”的意思。

发电机停运时氢干燥器能否投运？

前置隙缝的激励镜头放大倍率为（）。

A.5倍

B.2倍

C.1/2

D.1/5倍