小型油轮主要以运载（）为主。A.重油 B.成品油 C.轻质油 D.原油

某电网规划建设一座220kV变电所，安装2台主变压器，三相电压为220/110/10kV，220kV、110kV为双母线接线，10kV为单母线分段接线。220kV出线4回，10kV电缆出线16回，每回长2km。110kV出线无电源。电气主接线如图所示。

请回答下列问题。

该变电所10kV侧采用了YN，d接线的三相接地变压器，且中性点经电阻接地，请问下列哪项接地变压器容量选择要求是正确的？为什么？（注：SN为接地变压器额定容量，Pr为接地电阻额定容量）（）

A.

B.SN≤Pr

C.SN≥Pr

D.

Directions: Read the passage carefully. Then answer the questions or complete the statements in the fewest

possible words.

     Phys ed (physical education) is making a comeback as a part of the school core curriculum (核心课程),

but with a difference. While group sports are still part of the curriculum, the new way is to teach skills that

are useful beyond gym class. Instead of learning how to climb a rope, children are taught to lift weights,

balance their diets and build physical endurance. In this way,kids are given the tools and skills and experiences

so they can lead a physically active life the rest of their life.

     Considering that 15 percent of American children 6 to 18 are overweight, supporters say more money and

thought must be put into phys ed curriculum. In many cases, that may mean not just replacing the old gym-

class model with fitness programs but also starting up phys ed programs because school boards often "put

P.E. on the chopping block, cutting it entirely or decreasing its teachers or the days it is offered," says Alicia

Moag-Stahlberg, the executive director of Action for Health Kids. The difference in phys ed programs is partly

due to the lack of a national standard."Physical education needs to be part of the core curriculum," she added.

     The wisdom of the new approach has some scientific support. Researchers at the University of Wisconsin

have demonstrated how effective the fit-for-life model of gym class can be. They observed how 50 overweight

children lost more weight when they cycled and skied cross-country than when they played sports. The

researchers also found that teaching sports like football resulted in less overall movement, partly because

reluctant students were able to sit on the bench.

     Another problem with simply teaching group sports in gym class is that only a tiny percentage of students

continue playing them after graduating from high school. The new method teaches sells that translate to

adulthood.

(Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)

1. In the new P.E. program, children learn to lift weights, balance their diets and build physical endurance

    rather than ______.

2. As for P.E., some school boards either ______.

3. What are the two problems with simply teaching group sports?

    ____________________________________________________________________________________

4. What is the long-term benefit of the new P.E program?

    ____________________________________________________________________________________

输血后产生的血型抗体以哪种免疫球蛋白为主（）

A.IgA

B.IgD

C.IgE

D.IgG

E.IgM

持续性关节被动活动的禁忌证包括（）

A.肌腱撕裂伤

B.关节软骨损伤

C.关节外科手术后

D.四肢关节内、外骨折稳定固定后

E.连续被动运动造成正在愈合组织过度紧张

客户积分状态分为（）。

A.可查可兑

B.可查不可兑

C.不可查不可兑

D.不可查可兑