挪动法及四人搬运法时平车应紧靠____________________，大轮靠___

A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.

　　“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.

　　Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).

　　Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.

　　Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.

　　All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning----all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”

小题1:Carskadon suggests that high schools should not start classes so early in the morning because _______.

A．it is really tough for parents to enforce bedtime

B．it is biologically difficult for students to rise early

C．students work so late at night that they can’t get up early

D．students are so lazy that they don’t like to go to school early小题2:The underlined phrase nod off most probably means _______.

A．turn around

B．agree with others

C．fall asleep

D．refuse to work小题3:What might be a reason for the hard transfer from middle school to high school?

A．Adolescents depend more on their parents.

B．Adolescents have to choose their sleep patterns.

C．Adolescents sleep better than they did at childhood.

D．Adolescents need more sleep than they used to.小题4:What is the test mainly about?

A．Adolescent health care.

B．Problems in adolescent learning.

C．Adolescent sleep difficulties.

D．Changes in adolescent sleep needs and patterns.

下列不是面积单位的是[ ]

A．米

B．平方米

C．平方分米

D．平方厘米

分子筛

悬挂轿厢与对重的钢丝绳至少用两根，其静载安全系数n≥12。

亚洲金融危机的爆发深刻暴露了亚洲各国在协调经济政策、共同______危机方面的苍白无力。一种流行的观点认为，正是由于亚洲各国存在着经济与社会发展方面的差异性、多样性和文化的多元性，缺少一种强有力的______力量，才使亚洲各国在金融危机中吃尽苦头，元气大伤。因此，地区合作______和大量的双边援助是十分必要的。
填入横线部分最恰当的一项是( )。

A．防御 整合 沟通

B．防御 整治 勾通

C．抵御 整治 沟通

D．抵御 融合 勾通