问题 选择题

有关生活中的物理知识,下列说法不正确的是(    )

A.打开醋瓶能闻到酸味说明分子做无规则运动

B.用筷子夹取食物时,利用了摩擦力

C.水烧开时壶盖被顶起是水蒸气对壶盖做功的缘故

D.夏天使用电风扇时人感觉凉爽,是因为风降低了室温

答案

答案:D

题目分析:由于分子在永不停息地做无规则运动,所以打开醋瓶能闻到酸味,炒菜时能闻到香味等,A符合题意;用筷子夹食物时,物体不掉落是由于筷子和物体间的摩擦力与物体的重力平衡,B对;水烧开时水蒸气把壶盖顶起时,水蒸气对壶盖做功,自身内能减小,转化成壶盖的机械能,这也是热机的原理,C对;夏天使用电风扇时,空气的流动加快了人体表变汗液的蒸发,而蒸发吸热,所以人感到凉爽,而环境温度并没有降低,D错。

阅读理解

请认真阅读下面短文,并根据短文内容回答问题。

A 9.0-magnitude earthquake occurred

off the northeastern coast of Japan on 11 March

The earthquake in Japan on March 11,2011 was a 9.0 on the Richter scale (里氏). Over 6,500 died because of the disaster by March 18. The earthquake also caused a tsunami (海啸) and a nuclear leak (核泄漏).

However, most Japanese people stayed calm and orderly.They left broken houses calmly. They waited in line for food, water and public telephones. There was no robbing (抢劫) and no pushing.

Earthquakes hit Japan almost every year. People are ready for an earthquake at any time.

In Japan, you can learn about earthquakes on TV and in schoolbooks. Even the famous comic, Sakura Momoko (《樱桃小丸子》), shows earthquake training in a school. Almost every family in Japan has a survival kit (救生包). The kit has a flashlight (手电筒), a radio, water and enough food for several days.

Most buildings in Japan use wood. The material is less dangerous during a disaster. The buildings can  stand an earthquake of up to 7.0 on the Richter scale.

小题1:How large was the earthquake in Japan on March 11?

                                                           

小题2:What did the earthquake cause besides many people’s death?

                                                           

小题3:Where can Japanese people learn about earthquakes?

                                                           

小题4:What are most buildings in Japan made of?

                                                           

小题5:What can we learn from Japanese people if the disaster happens to us?

                                                           

单项选择题