情绪是与何种需要相联系的（） A.生理需要 B.交际需要 C.认知需要 D.安全需要

As many as 10 of the 17 kinds of penguins（企鹅）may be in danger of disappearing. The number of penguins have decreased(减少) by 30% since 1987.

　　Penguins are black and white birds that live in the southern part of the world. They are common in South America，New Zealand，Australia and South Africa. Many live near cold waters. But some live near warm waters in Galapagos Islands. Penguins cannot fly，but they are fine swimmers. Penguins eat fish and krill(磷虾).

　　The warming of the earth is the decrease in penguin populations. The heating of the air has caused ocean waters to become warmer. Higher water temperatures have reduced the supply of fish and krill. Some years later these birds are completely unable to reproduce(繁殖).　 Besides，many adult penguins die of hunger.

　　Widespread(广泛的) fishing，exploration for oil and oil leaks(漏) also make penguins be in danger. Poisonous organisms(生物) in ocean water are another danger. Penguins also have their enemies，including wild dogs，sharks，seals and sea lions.

　　News about penguins is not all bad，however. Several years ago，oil leaking from a ship hurt 40% of the penguins in South Africa. The penguins became covered with oil. But thousands of people helped clean and treat the birds well. Then they returned the penguins to the wild.　 Now these South African penguins are reproducing in higher numbers than before the oil leaking.

小题1:Penguins ___________.

A．can swim better than fly

B．can be found near Oceania (大洋洲)

C．eat fish only冬腊月

D．live only in cold waters.小题2:Which of the following is NOT the cause of penguin's decrease in numbers?

A．Oil searching.

B．Widespread fishing.

C．Human's killing.

D．Warming of the oceans.小题3: Why are the penguins in South Africa reproducing in higher numbers than before the oil leaking?

A．Because people removed the ship.

B．Because people sent a lot of penguins to the wild.

C．Because people helped the penguins.

D．Because people treated the penguins well.

对离心泵预热的要求是当泵入口温度与泵体温度差小于（）时，全开入口阀，泵处于备用状态。

A、40℃

B、60℃

C、80℃

D、100℃

— ____.

— Nice to meet you, too.      [ ]

A. Goodbye    

B. Nice to meet you    

C. goodbye

甲没有合法依据却取得了乙的财产，该不当得利返还请求权产生于人民法院受理破产申请之后，则根据规定；乙应该按照不当得利返还请求权申报破产债权。 ( )

混凝土留置试块时，每组为（）块。

A、3

B、4

C、6