近似数3.14万精确到______位，有______个有效数字，用科学记数法表示

情绪的外部表现称为表情，表情可分为三种（）。

A、手势表情

B、面部表情

C、身体表情

D、言语表情

E、动作表情

判断下列哪些行为习惯有助于减小患心血管疾病的几率。（画“Y”表示认可）

根据上述表格内容，你认为在日常生活中，应该如何控制和预防心血管疾病的发生？

第七届城市运动会将于今年10月在江西南昌举行。

运动会的吉祥物是每一届重大体育盛会的标识物。右图“鄱鄱”是“七城会”的吉祥物。她以民意调查最受欢迎的“白鹤”为形象，结合“火、鄱阳湖”等元素，胸前用毛体字写有“2011·南昌”字样，一手呈“V”型手势，脚踏鄱阳湖，张开双翼，跃跃欲飞……蕴含着丰富的精神内涵。

欣赏了可爱的“鄱鄱”后，请你运用所学知识，探究其组成元素与创意中蕴含了哪些丰富的精神内涵？

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There are various reasons why cancers appear to be on the increase. For one thing, though their sufferers are to be found in all age groups, cancers are particularly likely to attack persons in their middle and advanced years. Naturally, since people live longer these years, there are more cancer sufferers than before. Again, with better methods of diagnosis (诊断), doctors can more easily recog­nize cancerous growths that would formerly have passed unnoticed or that would have been wrongly di­agnosed. It is also believed that certain habits and conditions of modem living, including heavy smok­ing and the pollution of the air, may leave people living in more cancer-causing conditions than before.

We all look forward to the day when a simple medical test can find cancer while it is still small. Researchers around the world are working on such a test. Most of their work deals with the examina­tion of the blood.

Researchers in Boston have found something in the blood of cancer patients that does not appear in healthy persons. The test showed which persons had cancer and which did not. It was correct more than 90 percent of the time.

The researchers believe the test may be able to show cancer very clearly in its development. Cancers discovered early usually can be treated successfully.

The test examines very small bits of fat in the blood called lipids (脂质). Cancers seem to change lipids although doctors do not know why. The test showed differences between the lipids of the persons with cancer and the lipids of those without cancer.

The researchers say the new test could be a step to develop a simple way to check patients for cancer before the disease shows on an X-ray.

1. Who will fail cancer from the study of the researchers?

A. The young.                         B. The middle age and the older.

C. The man.                                  D. The woman.

2. The underlined words "such a test" refer to________.

A. the test that shows which persons have cancer and which don’t     .

B. the test that may be able to show cancer very early in its development,.

C. a simple medical test that cannot find cancer when it is -small

D. a new test that could be a step to develop a difficult way

3. Which of the following statements is true according to the passage?

A. Cancers have much to do with something in patients’ blood.

B. People living in better conditions are most likely to be attacked by cancer.

C.X-raying is the best way to determined whether a person has cancer or not.

D. Cancers have nothing to do with a person’s habits and living conditions.

4. What would be the best title for the passage?

A. A simple way to cancer                B. Cancers can be cured

C. How to find cancer                          D. Early discovery of cancer

1912年，世界上最大的一艘客轮“泰坦尼克”号在初次航行中便撞上了冰山，沉没在浩瀚的北大西洋中。这次海难的原因之一是“不会沉没”的说法使人们思想麻痹，放松了警惕；原因之二是“船太大，难掉头”。“泰坦尼克”号事件揭示的哲理是( )。

A．人们对客观事物的反应是有差别的

B．矛盾双方是一定要转化的

C．一切从实际出发

D．实践推动认识的产生和发展