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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】设F(x)=g(x)φ(x)，φ(x)在x=a连续但不可导，又g’(a)存在，则g(a)=0是F(x)在x=a可导的( )条件．
A.
充分必要
B.
充分非必要
C.
必要非充分
D.
既非充分也非必要
【单选题】Mr.Tuner had been a captain for many years. He was good at shooting (射击). In the army he taught new soldiers to shoot. Then he left the army and began to work in a bank as a night watchman. He worked ...
A.
The young man was good at shooting.
B.
Mr.Turner liked the young man very much.
C.
Mr.Turner disliked the young man.
【单选题】Mr.Tuner had been a captain for many years. He was good at shooting (射击). In the army he taught new soldiers to shoot. Then he left the army and began to work in a bank as a night watchman. He worked ...
A.
Worked as a guard.
B.
Worked as a driver.
C.
Worked as a teacher.
相关题目：
【单选题】设F(x)=g(x)φ(x)，φ(x)在x=a连续但不可导，又g’(a)存在，则g(a)=0是F(x)在x=a可导的( )条件．
A.
充分必要
B.
充分非必要
C.
必要非充分
D.
既非充分也非必要
【单选题】设 具有二阶连续导数, , ,则( )
A.
是 的极大值
B.
是 的极小值
C.
是 的拐点
D.
非极值， 非拐点
【单选题】设函数f(x)连续，，则F’(x)=______。
A.
-f(x2)
B.
f(x2)
C.
-2xf(x2)
D.
2xf(x2)
【单选题】A．不仅可导，导数也连续 B．不连续 C．连续，不可导 D．连续且可导
A.
在X=0处（）。
在X=0处（）。【单选题】瞄准∶射击
A.
闪电∶下雨
B.
学习∶进步
C.
打铃∶下课
D.
入水∶游泳
【单选题】设具有一阶连续导数，，则是在处可导的（ ）.
A.
充分但非必要条件
B.
既非充分也非必要条件
C.
充分且必要条件
D.
必要但非充分条件
【单选题】Mr.Tuner had been a captain for many years. He was good at shooting (射击). In the army he taught new soldiers to shoot. Then he left the army and began to work in a bank as a night watchman. He worked ...
A.
The young man was good at shooting.
B.
Mr.Turner liked the young man very much.
C.
Mr.Turner disliked the young man.
【单选题】Mr.Tuner had been a captain for many years. He was good at shooting (射击). In the army he taught new soldiers to shoot. Then he left the army and began to work in a bank as a night watchman. He worked ...
A.
Worked as a guard.
B.
Worked as a driver.
C.
Worked as a teacher.