氢气在氧气中燃烧生成水的反应中，氢气、氧气、水的质量比为 A．1∶16∶18 B

阅读理解。

     Jim is a very busy 8-year-old boy. He is good at many kinds of sports. It is easy to see that Jim is very active after school. In contrast(相比之下), while most American children are in school, they have a PE class just (A)每周一次 for 45 minutes. Boys and girls from Grade 1 to Grade 12 do not have to exercise.

Not all American children are (B) as active in sports after school as Jim is. Therefore, these boys and girls need to exercise in school. Many people believe that (C)美国孩子们的健康 is in trouble. In fact, 40% of children aged 5 to 8 may be unhealthy already. For example, many are overweight. Doctors believe that these are the results of physical inactivity and poor diet (饮食).

     In many countries in the world , all schoolchildren have to do one hour of exercise every day. These exercises do not have to be team sports.(D) They may not be difficult , such as running or jumping. Doctors believe that habits learned early are more probable to stay with us all our lives. School is the good place to learn these habits , or practices. Active , healthy children who exercise often can become active, healthy adults(成年人)

1.将划线（B）译成英语。

___________________________________________________

2.将划线（C）译成汉语。

___________________________________________________

3.将划线（D）译成英语。

___________________________________________________

4.将划线（E）改写成： _____________they _____________difficult, such as running or jumping.

5. According to (根据) this article , what kind of children can become active, healthy adults(成年人)?

_________________________________________________________

消法

我市某中学化学兴趣小组用以下装置探究炼铁的原理。

(1)甲仪器的名称是_________；乙仪器的名称是_________。

(2)实验过程中，先要进行的是______________。（填Ⅰ或Ⅱ）

Ⅰ．加热 Ⅱ．通一氧化碳

(3)方框中连接的是C和D，导管接口的连接顺序为：a→(______)→(_______)→(________)。

(4)玻璃管A中发生反应的化学方程式为：_______________，用这种方法“炼” 得的铁与工业上炼出的生铁在组成上的最大区别是：_______________。

促进肠粘膜对钙、磷吸收的是（）。

A.1，25-（OH）2-D3

B.PTH

C.CT

D.1-OH-D3

E.25-OH-D3

设计技术指标内，在不开跳频时，要求同频干扰保护比（）

A.C/I（9dB）

B.C/I（10dB）

C.C/I（11dB）

D.C/I12dB