尿胆原测定的方法是（） A.Rothera法 B.Smith法 C.Harrison

阅读理解。

     This is Jim. He is thirteen. He is from the U.S.A. He is a student. He has a good friend.

His name is Jack. Jack is fifteen. He is from Australia. Jack is tall but Jim is short. They are

in the same class, but they are in different grades. Jim is in Class Two. Jack is in Class Two,

too. They go to school(上学) at seven in the morning and go home(回家) at six in the

afternoon.

1. Jim and Jack are ____.

A. sisters

B. friend

C. teacher and student

D. from different countries(国家)

2. Jim and Jack are in ____.

A. the same grade

B. different grades

C. the same color

D. the same family(家庭)

3. Jack is in ____.

A. Class 4

B. Class 3

C. Class 2

D. Class 1

4. They go to school at ____ in the morning.

A. 6:00

B. 7:00

C. 7:30

D. 8:00

5. Jim is ____.

A. short

B. tall

C. strong

D. big

研究疾病分布的意义有

A．有利于国家的经济建设

B．可更好的提高人民的健康水平

C．它是研究疾病的流行规律和探索病因的基础

D．可帮助我们认识疾病流行的基本特征

E．有助于为制定疾病的防止、保健策略及措施提供科学依据

参加植树活动时，同学们联想到一些物理知识，下列论述中正确的是 [ ]

A．小强拎起一桶水的同时感觉手疼，说明物体间力的作用是相互的

B．小刚泼水时，盆子留在手中而水“飞”了出去，是因为水有惯性，盆子没有惯性

C．小红沿水平方向用力拉一筐土，没有拉动，此时拉力小于摩擦力

D．小丽尽全力向上搬一块大石头，没有搬动，她对石头的拉力一定等于石头的重力

简述F组贸易术语的异同

当把动物的毒理学资料外推到人时，人和动物（）的种差异是必需考虑到的。

A.种属间

B.体重

C.体温

D.年龄