皮皮学，免费搜题
登录
搜题
【单选题】
设F(x)是f(x)的一个原函数，则∫e-xf(e-x)dx等于( )。A.
F(e-x)+C
B.
-F(e-x)+C
C.
F(ex)+C
D.
-F(ex)+C
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】The children (play) ______ the violin over there will go on the stage next week.
【单选题】Last year the children often __________. [ ]
A.
play the piano
B.
played the piano
C.
play piano
D.
played piano
【单选题】She needs other children ______.
A.
to play
B.
whom to play
C.
to play with
D.
whom to play with
【单选题】Play is usually associated with children. Many people consider it to be a waste of time and as something unproductive. In fact, in early years of one’s life, play plays an important role in the proces...
A.
Children who play grow up to be intelligent.
B.
For children play is another way to observe, participate and learn.
【单选题】Children experts suggest children ______ more time to play freely.
A.
are given
B.
will be given
C.
be given
D.
must be given
相关题目：
参考解析：
知识点：
题目纠错 0
发布
