Anhui ordinary high school academic level examination in

Scientific basis

The first volume (multiple choice questions)

Multiple choice questions (including 10 questions, 2 points for each question, ***20 points. Of the four options given in each small question, only one meets the requirements of the topic, and no points will be given if you don't choose, choose wrong or choose more. )

3 1. The particle is a physical model, and the following statement about the particle is correct.

A only objects with very small mass can be considered as particles.

B. Only small objects can be considered as particles.

Only objects with small mass and volume can be considered as particles.

D whether an object can be regarded as a particle is determined by the nature of the research problem.

32. The following represents the average speed.

A. The walking speed of a classmate from home to school is about1.5m/s.

B the speed of the racing car when it jumps over obstacles is about 80m/s.

C. The speed of the plane when taking off is about120m/s..

D the speed of the long-range projectile leaving the muzzle is about 2000m/s.

33. From Tianjin to Shanghai, you can take the train, ship or plane. The curves acb, adb and aeb in the figure represent the railway line, sea route and air route from Tianjin to Shanghai respectively, so the following statement is correct.

A. the distance by train equals the displacement.

B.the distance by boat is equal to the displacement.

The displacement of trains, ships and planes is the same.

D. The distance between train, ship and plane is the same.