国际投资中可能会涉及到的货币种类有（）。 A.本国货币 B.投资国货币 C.东道国货

阅读短文，根据其内容回答问题。

Phys ed (physical education) is making a comeback, but with a difference. The new way is to teach skills that are useful beyond gym class, like lifting weights, balancing their diets and building physical endurance（耐力）.

Considering that 15% 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（教育委员会）often “cut P.E. completely or decrease（减少）its teachers or the days it is offered,” says Alicia Moag-Stahlberg, the director of Action for Health Kids. The difference in phys ed programs is its short of a national standard.

The wisdom of the new idea has some scientific support. Researchers at the University of Wisconsin have showed how successful 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 have also found that teaching group sports like football results in less overall（全体的）movement, partly because the students who are unwilling to do may sit on the bench.

Another problem with simply teaching group sports in gym class is that only a small part of students continue playing them after finishing their high school. The new method teaches skills that translate to adulthood, which means kids are given skills and experiences so they can lead a physically active life in their future.

小题1:Is the new Phys ed program different from the one before?

小题2:What does the new P.E. program teach the students?

小题3:According to the passage, what do some school boards do with P.E?

小题4:What are the problems with simply teaching group sports?

小题5:What’s the passage mainly about?

细胞有丝分裂中纺锤体的主要作用为：（）

A.使染色体排列到赤道面上

B．使姐妹染色单体在后期时分离

C．使染色体进入分裂期后发生凝集

D．使染色体进入分裂末期后去凝集

请简述课程开发的步骤。

过磷酸钙含水溶性，因此比钙镁磷肥好。

按照《混凝土结构工程施工规范》（GB50666-2011）的规定，高大模板支架单根立杆的轴力标准值不应大于（）

A.12kN

B.15kN

C.10kN

D.20kN