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【单选题】
已知函数f(x) 的导数 在闭区间[1,2] 上连续,若函数值 f(1)=1 , f(2)=2 ,一阶导数值 , ,则定积分A.
1
B.
2
C.
3
D.
4
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举一反三
【单选题】A rock cracks when ______.
A.
rain falls
B.
it gets very hot
C.
it gets very cold
D.
either B or C
【单选题】The bag that my grandpa made for me ______ gets out of style, but it is still the best thing in my mind. [ ]
A.
usually
B.
normally
C.
gradually
【单选题】Grandpa gets very whenever he talks about the war in which he fought many years ago.
A.
emotional
B.
emotion
C.
feeling
D.
feel
【简答题】一个源程序文件可由一个或多个( )组成。
【单选题】Grandpa gets very _______ whenever he talks about the war in which he fought many years ago.
A.
superficial
B.
internal
C.
exclusive
D.
emotional
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