肱二头肌反射的中心位于（） A.颈2～3 B.颈3～4 C.颈4～5 D.颈5～6

阅读理解。

Jackie Chan was born on Apirl 7, 1954, in Hongkong,China. His parents left mainland China for Hong Kong a short time before he was born. His parents named him "Chang Kongsang", which means "born in Hong Kong". They wanted to celebrate a safe trip to HongKong.          At first, Jackie's family lived in the French Embassy (大使馆). His father was a cook, and his mother a housekeeper. When Jackie was seven years old, his family moved to Australia. His father got a job in the American Embassy. Later, back in Hong Kong Jackie's father sent him to the China Drama Academy. Jackie studied and worked 19 hours a day. The students practised KungFu and learned how to do many stunts (特技表 演) there.          When Jackie was seventeen years old, he began to do dangerous stunts for films. In the early 1980s, Jackie went to Hollywood, but he wasn't very successful. He went on to make films in HongKong and had great success. Finally, in 1995, Jackie Chan has both Chinese and American fans ,and his films make millions of dollars.

1.What is Jackie Chan?

[ ]

A.He is a cook B.He is a singer C.He is a film star D.He is a housekeeper

2.When did Jackie Chan's parents move to HongKong?

[ ]

A. They moved to HongKong a short time after Jackie Chan was born B. They moved to HongKong a short time before Jackie Chan was born C. They moved to HongKong after they came back from America. D. They moved to HongKong after Jackie Chan studied in the China Drama Academy.

3.What did Jackie Chan learn in the China Drama Academy.

[ ]

A.Singing B.Dancing C.KongFu and stunts D.Dramas

4.Which is ture according to the passage?

[ ]

A.Jackie Chan is about forty years old. B.He was born in America C.He wasn't very successful when he first went to Hollywood D.He became famous at the age of 17.

5.From the passage we know that __________________

[ ]

A. neither his American fans nor his Chinese fans like his films B. only his Chinese fans like his films C. everybody in the world likes his films very much D. his films are popular not only in China but also in America

小明去武汉江夏基地军训时，在后山上捡了一块非常漂亮的大理石，他非常想知道这块石头的密度，于是在老师的带领下去了综合实验室．由于存放不当，天平附带的砝码严重生锈，小明只能利用天平了．老师又帮他找了量筒、两个完全相同的烧杯、细线、滴管等器材．小明稍加思考，决定用以下方法进行实验：

（1）实验过程：

①将天平放在水平台上，游码拨到左端零刻度线处，发现此时指针如图甲所示，则应向______调节平衡螺母使天平平衡．

②在天平左右两盘各放一只相同的烧杯，将大理石放在左盘的烧杯里，在右盘的烧杯中加水，快平衡时用滴管调节水的多少，直到天平平衡（如图乙）．

③将烧杯中的水倒入量筒中（液面位置如图丙），读出体积并记录．

④用排水法测得大理石的体积为20cm³．

（2）收集与处理实验数据：请你将实验数据填入下表并计算．

量筒中水的体积V1/cm3	量筒中水的质量 m1/g	大理石的质量 m2/g	大理石的体积 V2/cm3	大理石的密度ρ/ g-cm-3

（3）请你分析，实验中步骤______会存在较大地误差，会使实验结果偏______（选填“大”或“小”）．

人在寒冷环境中，产热主要通过( )

A．皮肤血管收缩

B．心跳加快

C．寒战

D．进食增加

E．胰岛素分泌增加

We'll go to the farm and help the farmers with the apple-picking if it _____ tomorrow. [ ]

A. won't rain

B. will be rainy

C. doesn't rain

D. isn't raining

青春期性教育包括（）

A.性生理教育

B.性心理教育

C.性道德教育

D.性美学教育

E.以上都包括