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【简答题】
设函数f（x）=e x +sinx，g（x）=ax，F（x）=f（x）﹣g（x）． （1）若x=0是F（x）的极值点，求实数a的值； （2）若x＞0时，函数y=F（x）的图象恒在y=F（﹣x）的图象上方，求实数a的取值范围．
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举一反三
【单选题】It is better for a teacher to indicate locations of errors in students' papers than to correct them because of the following reasons except that______.
A.
the teacher may misread the students'intentions
B.
to indicate error locations is less time consuming
C.
indication of errors has the same effects on students as the correction of errors
D.
to correct students' errors can make students lose face
【简答题】影响衰老的外界条件有_______、________、_________、_________。
【单选题】12,血管损伤后,完成血小板粘附功能所需主要条件是()
A.
微血管壁结构正常
B.
有足够的血小管数量
C.
血管内皮下胶原纤维
D.
凝血酶,ADP,胶原等
E.
纤维蛋白原,血小板膜糖蛋白IIa/IIb,钙离子等
【单选题】The teacher, along with 5 of her students, ________talking with a foreign teacher in the English Corner at that time.
A.
was
B.
were
C.
had been
D.
would be
【单选题】Making a speech like that is not ________ for him as a teacher. [ ]
A.
suitable
B.
fit
C.
appropriate
D.
correct
【单选题】It is better for a teacher to indicate locations of errors in students' papers than to correct them because of the following reasons EXCEPT that_____.
A.
the teacher may misread the students' intentions
B.
to indicate error locations is less time consuming
C.
indication of errors has the same effects on students as the correction of errors
D.
to correct students' errors can make students lose face
【简答题】影响衰老的外界条件有( )、( )、( )、( )。
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