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【单选题】
（2011?翁牛特旗）如图所示，小球沿轨道由静止从A处运动到D处的过程中，忽略空气阻力和摩擦力，仅有动能和势能互相转化．则（ ）A.
小球在A处的动能等于在D处的动能
B.
小球在A处的动能大于在D处的动能
C.
小球在B处的机械能小于在C处的机械能
D.
小球在B处的机械能等于在C处的机械能
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举一反三
【单选题】Which of these was “not” a decisive factor in encouraging Confederation?
A.
A desire to become independent from Britain
B.
Defense against the United States
C.
Political deadlock in Canada
D.
Easing of trade restrictions
【单选题】Which of the following was NOT a factor which had contributed to the fact that Britain was the first country to industrialize?
A.
its ideal geographical location
B.
a peaceful society it had enjoyed
C.
due respect paid to the invention
D.
unlimited monarchy
【简答题】No matter who he is, young or old, people's state of mind tends to keep ______ with the rapid change of society. A) contact B) progress C) touch D) pace
【单选题】Which factor did Chuck Peterson NOT take into consideration when he was going to buy a new battery?
A.
A reasonable price of the battery.
B.
A convenient place to buy the battery.
C.
Beautiful packaging of the battery.
D.
A familiar brand of the battery.
【单选题】Which of the following was NOT mentioned as a factor contributing to the spread of employment?
A.
The enclosures of the 17th and 18th centuries.
B.
The development of factories.
C.
Relief from housework on the part of women.
D.
Development of modern means of transportation.
【单选题】No matter who he is, young or old, people's state of mind tends to keep _______ with the rapid change of society.
A.
contact
B.
progress
C.
touch
D.
pace
【单选题】In The Law of Life, Old Koskoosh's son, the tribe chief, came to say good-bye, and briefly explained the situation the tribe was facing. He mentioned some factors that forced him to abandon the sickly...
A.
The tribesmen had to travel long and fast.
B.
The tribesmen had to start hunting for meat immediately.
C.
Some tribesmen showed unwillingness to take the old man.
D.
The loads on the dog sleds were already heavy.
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