问题
选择题
Having ended the major combat (主战), President Bush_____ rebuilding Iraq.
A．started out
B．went all out
C．turned to
D．went on
答案
C
turn to doing sth转向（做）……。
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Having ended the major combat (主战), President Bush_____ rebuilding Iraq.
A．started out
B．went all out
C．turned to
D．went on
C
turn to doing sth转向（做）……。
穿过中间磁场，进入右边磁场后能按某一路径再返回到电场的边界MN上的某一点b，途中虚线为场区的分界面．求：