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【单选题】
甲缓慢地将弹簧从拉长了 l ,之后,缓慢地将弹簧继续拉长了 2 l /3 ,则两者做功( )。A.
A 甲 > A 乙
B.
A 甲 乙
C.
A 甲 =A 乙
D.
无法比较
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反馈参考答案：
举一反三
【单选题】Python内置函数()可以返回列表、元组、字典、集合、字符串以及range对象中元素个数。
A.
length()
B.
size()
C.
len()
D.
Length()
【单选题】I broke the national seventeen/ eighteen-year-old 400-freestyle record when I was _______.
A.
fourteen
B.
fifteen
C.
seventeen
D.
eighteen
【单选题】freestyle dance
A.
It is a way of dancing in which the dancer improvises his moves instead of having them planned beforehand.
B.
It is a dance competition in which the dancers are required to dance freely.
【判断题】The Mississippi-Colorado river system is the longest in the United States and the second longest in the World
A.
正确
B.
错误
【简答题】freestyle stroke
【单选题】Of all the American Presidents, whose presidential term is the longest?
A.
George Washington.
B.
Thomas Jefferson.
C.
Abraham Lincoln.
D.
Franklin Roosevelt.
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