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【多選題】
下列現象中滿足機械能守恒的有（ ）
A.
小球以一定的初速度豎直向上拋出，整個運動過程中不受任何阻力。
B.
物體沿光滑的曲面從頂端向底部滑動。
C.
降落傘下懸掛一物體一起勻速下落。
D.
物體在一沿斜面向上的外力作用下，物體沿斜面向上勻加速運動。
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舉報參考答案：
舉一反三
【單選題】It’s generally accepted that smoking is _____ to our healthy.
A.
harmful
B.
hopeful
C.
powerful
D.
painful
【單選題】The title of the article should be___________ .
A.
Eating and Exercising
B.
How Vitamins Work in Man's Body
C.
Staying Healthy
D.
Sleeping Well
【單選題】_____made her excited was ______ she had managed to win her house back.
A.
That; when
B.
It; that
C.
What; that
D.
What; whether
【單選題】The unlucky ones mentioned by the doctor were __________. .
A.
those who suffered from illness.
B.
those who were killed during the war
C.
those who slept in the air-raid shelter.
D.
those whose homes were destroyed in air-r
【單選題】The new stadium being built for the next Asian s will be _____ the present one.
A.
as three times big as
B.
three times as big as
C.
as big as three times
D.
as big three times as
相關題目：
【單選題】It’s generally accepted that smoking is _____ to our healthy.
A.
harmful
B.
hopeful
C.
powerful
D.
painful
【單選題】The title of the article should be___________ .
A.
Eating and Exercising
B.
How Vitamins Work in Man's Body
C.
Staying Healthy
D.
Sleeping Well
【單選題】_____made her excited was ______ she had managed to win her house back.
A.
That; when
B.
It; that
C.
What; that
D.
What; whether
【單選題】The unlucky ones mentioned by the doctor were __________. .
A.
those who suffered from illness.
B.
those who were killed during the war
C.
those who slept in the air-raid shelter.
D.
those whose homes were destroyed in air-r
【單選題】The new stadium being built for the next Asian s will be _____ the present one.
A.
as three times big as
B.
three times as big as
C.
as big as three times
D.
as big three times as
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