【简答题】翻译一下句子: The braking system on a vehicle has
three main functions. It must be able to reduce the speed of the vehicle, when
necessary; it must be able to stop the car in as short a distance as possible...
【简答题】Fill in each blank with “fit”, “live”, “lift”, “build” or “gain” in the word’s proper form. 1. He _____ to the age of 80. 2. The house is _______ of bricks. 3. The trousers don’t ____ hi...
【单选题】The car ______ speed as it went down the hill.
【单选题】A car rounds a curve while maintaining a constant speed. Is there a net force on the car as it rounds the curve?
A.
No—its speed is constant.
C.
It depends on the sharpness of the curve and the speed of the car.
【简答题】给出下列句中的中文含义 The braking system on a vehicle has three main functions. It must be able to reduce the speed of the vehicle, when necessary; it must be able to stop the car in as short a distance as poss...