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【简答题】
如图所示,( )为电台天线口,( )为PC端7针借口,( )为主机充电口,( )为外挂电台或外接电源口。
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举一反三
【单选题】设f(x)在x=a点可导，则|f(x)|在x=a不可导的一个充分条件是( )．
A.
f(a)=0，f'(a)=0
B.
f(a)=0,f'(a)≠0
C.
f(a)＞0，f'(a)＞0
D.
f(a)＜0，f'(a)＜0
【简答题】( )是消费者的购物凭证,也是( )的基础和依据。
【单选题】设函数f(x)在点x=a处可导，则甬数｜f(x)｜在点x=a处不可导的充分条件是( )．
A.
f(a)=0且f'(a)=0
B.
f(a)=0且f'(a)≠0
C.
f(a)>0且f'(a)>0
D.
f(a)<0且f'(a)<0
【单选题】设函数f(x)在点x＝a处可导，则函数｜f(x)｜在点x＝a处不可导的充分条件是( )．
A.
f(a)＝0且fˊ(a)＝0
B.
f(a)＝0且fˊ(a)≠0
C.
f(a)＞0且fˊ(a)＞0
D.
f(a)＜0且fˊ(a)＜0
【单选题】How did Franklin help George Washington?
A.
He provided Washington with a lot of money.
B.
He persuaded France to support Washington.
C.
He served as a general in Washington's army.
D.
He represented Washington in negotiations with Britain.
【单选题】The battle of Trenton was very important to Washington because______.
A.
it gave Washington the victory he needed
B.
it was his last battle as a general
C.
he defeated all the British soldiers
D.
it won the war for American independence
【单选题】Washington's greatness showed itself in that______.
A.
Washington worked under the Continental Congress
B.
Washington limited his role to being administrators of the laws
C.
Washington was both a great administrator and a great leader
D.
Washington established the precedent of the two-term Presidency
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