问题
选择题
The mayor often says that providing children with __________ to the useful information is of great importance.
A．access
B．prevention
C．protection
D．allowance
答案
答案：A
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The mayor often says that providing children with __________ to the useful information is of great importance.
A．access
B．prevention
C．protection
D．allowance
答案：A
与直线2z+3y-6=0的交点位于第一象限，则直线l的倾斜角的取值范围是（）。