问题 填空题

气体、液体都可以流动,称为流体.在气体和液体中,流速越大的位置,压强______.当人靠近高速行驶的列车时,会出现人被吸向列车的现象.这是因为高速列车带动空气流速______,压强______造成的.

答案

(1)流体的流速越大压强越小.

(2)人离高速列车比较近时,高速列车的速度很大,人和高速列车的之间的空气流动速度很大,压强小,人外侧的压强不变,人受到外侧压强大于人内侧受到的压强,人在较大的压强差作用下很容易被压向列车,发生交通事故.

故答案为:小;大;小.

阅读理解

阅读理解。

     Registration (注册) Details: PARASOL EMT Pty Limited (ABN 39 072 488 914)

     Recognition Period: 01/01/2010 to 30/03/2020

     Purpose: The aim of this course is to develop a student's competence (胜任) and confidence in providing

     emergency first aid. This includes calling for help, the ability to respond to first aid situations, decision-

     making, and basic life support functions. This course covers adult and child conditions.

     Target Audience: This course is suitable for the students requiring a first aid certificate (证书) for the

     workplace, recreational purposes, sporting, or home use.

     Format (形式): A mixture of theoretical and practical elements (成分), with at least 50% of time spent on

     practical skills.

     Requirements: Be at least 14 years of age.

     Learning Objectives:

     ● Apply Life Support Skills

     ● Apply First Aid Management Skills for Burns

     ● Demonstrate the identification and management of bleeding and wounds.

     ● Describe the recognition and management of internal bleeding

     ● Manage an Emergency (Basic)

     ● Apply First Aid Management for bone and joint (关节) injuries

     ● Manage Emergency Situations

     ● Apply First Aid Management skills for bites, stings and poisoning.

     ● Manage an acute illness

     ● Describe the recognition and management of an eye injury

     ● Describe the basic structure and function of the human body.

     ● Apply First Aid Management skills for chest, abdominal (腹部的) and head injuries

1. The underlined phrase "target audience" probably means _____. [ ]

A. what performance the audience want to see

B. all kinds of audience who are to be attracted by the course

C. adults are suitable to be engaged in first aid work

D. a limited group that the course is aimed at

2. According to the ads after you finish this course, you will probably do all the following EXCEPT _____.[ ]

A. you can deal with common animals' bites and stings

B. you can do an operation on the chest and head

C. you can give first aid when someone hurt his leg badly

D. you can tell whether a person is bleeding inside his body

3. What is the main purpose of the advertisement? [ ]

A. To make a person competent to give first aid.

B. To develop the students' ability to give first aid.

C. To persuade the students to take part in the first aid course.

D. To tell the students more about basic structure and function of the human body.

单项选择题