【单选题】Awoman has ,to be______a man to go half as far.
【多选题】水泵有很多分类形式,按照工作原理可以分为()
【单选题】The little town has now grown into a modern big city, and is _____ what it used to be. [ ]
【单选题】Object 1 has twice the mass of Object 2. Both objects have the same kinetic energy. Which of the following statements is true?
A.
Both objects can have the same magnitude of momentum.
B.
Object 1 has a momentum of greater magnitude than Object 2.
C.
The magnitude of the momentum of Object 2 is four times that of Object 1.
D.
All the statements are false.
E.
All the statements are true.
【判断题】燃料电池化学反应产物主要是电能和水,还有极度多的二氧化碳和氮氧化物。
【单选题】Object 1 has twice the mass of Object 2. Each of the objects has the same magnitude of momentum. Which of the following statements is true?
A.
Both objects can have the same kinetic energy.
B.
One object has 0.707 times the kinetic energy of the other.
C.
One object has twice the kinetic energy of the other.
D.
One object has 4 times the kinetic energy of the other.
【单选题】The production of the factory has grown to _____ in 1999.
【单选题】— Has the little girl passed ______ P.E.test? — She has tried twice, and the teacher will allow her to have _____ third try.