伽利略相对性原理说的是（）

unit 8. 翻译下列定语从句，请留意带下划线的句子。 Patients who report a family history of hereditary disorders and possible malignancies should have appropriate screening. Food which is kept too long decays because it is attacked by yeasts, moulds and bacteria. In the old days people on long sea voyages used to go short of vitamin C, which made some of them fall ill. In 1952 London had a very bad four- day smog in which 4000 bronchitis sufferers died. All living things are made of cells, as we have learnt before. Two atoms of hydrogen, which we know as a gas, unite with one atom of oxygen, also a gas, to form a molecule of a liquid, water.

A、冲量矩守恒

B、动量矩守恒定律

C、动量守恒

D、动量矩定理

A、机械平台

B、驱动控制系统

C、决策系统

D、感知系统

A、抬起伤员时，先抬脚后抬头；搬运时伤员脚在前，头在后；放下伤员时，先放脚后放头。

B、抬起伤员时，先抬头后抬脚；搬运时伤员脚在前，头在后；放下伤员时，先放脚后放头。

C、抬起伤员时，先抬头后抬脚；搬运时伤员脚在前，头在后；放下伤员时，先放头后放脚。

D、抬起伤员时，先抬头后抬脚；搬运时伤员头在前，脚在后；放下伤员时，先放脚后放头。