简述单向纵列式三级三场编组站的特征与主要优缺点。

细菌在生长发育后期形成的休眠体又叫______，它对不良环境有较强的抵抗能力．

要制得148gCa(OH)₂，需要多少克CaO与足量的水反应？提示：该反应的化学方程式为：

CaO + H₂O==Ca(OH)₂

读“南方地区图”，回答问题。

（1）B城市的经纬度是_____________，D是我国面积最大的淡水湖__________湖。

（2）C城市是________市，E（特别行政区）的支柱产业是________业，靠近香港的经济特区是________

市。

（3）①__________（山脉）是我国1月0℃等温线、800毫米等降水量线经过的地区。

（4）穿越南方地区的南北向铁路线有京广线、__________线等（举1例）。

（5）珠江三角洲地区为我国经济发达地区，请列举一例该地区发展经济的有利条件：_____________________________________________________。

阅读理解

     Compared to adults, children seem to be moving constantly. So it's no surprise that most parents

who are quizzed about their child's physical activity level describe their children as fairly active. But a

new study of nearly 2000 British school children suggests that many parents overestimate the amount

of physical activity their children are really getting.

     The researchers equipped 1892 British school children, ages 9 and 10, with accelerometers that

measure all physical  activity  during  a  given  time  period.  The research, known as the Speedy study

collected the exercise data from children at  92  schools  in  Norfolk, England, between April and July

2007.

     A child was regarded inactive if he or she recorded less than an hour a day of physical activity.

Although the majority of children studied were getting enough physical activity, a_sizable_minority_of

_children_were_not. Overall,39 percent of girls and 18 percent of boys studied were getting less than

an hour of physical activity each day.

     But if you asked the parents of the inactive children to describe their child's activity level, the vast

majority-80 percent-described their children as fairly or very physically active, according to the findings

published in the American Journal of Preventive Medicine. Interestingly, the children themselves had

more awareness about their lack of physical activity. Overall, 40 percent of children overestimated their

physical activity.

     But it wasn't the parents of overweight children who were most likely to guess wrong about physical

activity levels. The parents who were most out of touch about their child's physical fitness were more

likely to  have children who were slim. Parents of girls were also more  likely  to  overestimate  physical

  activity.  The  researchers noted that parents should be educated about the importance of physical

activity for children even if the child is not overweight.

    “Parents of slim children appear to assume that  their children are adequately active.”the study

authors  reported. “Increasing awareness regarding health benefits of physical activity beyond weight

control might  help have a correct idea of physical activity levels and encourage behavior change.”

1. According to the Speedy study, what kind of children   can be judged physically inactive?

A. Slim children.

B. Children with less than an hour a day of physical activity.

C. Overweight children.

D. Children out of touch with their parents for a long time.

2. What does the writer probably mean by saying “a sizable minority of children were not”in Paragraph 3?

A. The amount of children's physical activity is far from the writer's satisfaction.

B. Only a small number of children were not getting enough physical activity.

C. A small number of children didn't overestimate their physical activity.

D. The minority of children were not studied at all.

4. The passage is intended to________.

A. encourage parents to fairly judge their children's physical activity levels

B. persuade parents to keep an eye on their children's weight

C. urge children to wear accelerometers during exercise

D. advise parents to keep in touch with their children

适龄儿童、少年不入学接受义务教育的，自哪个单位对他的父母或者其他监护人批评教育，并采取有效措施责令其送子女或者被监护人人学（）。

A.所在学校

B.所在县市教育行政部门

C.当地人民政府