若x2+mx﹣15=（x+3）（x+n），则m的值是[ ]
A．﹣5
B．5
C．﹣2
D．2
答案：C
— I can't see the blackboard very well.
—Perhaps you need____. [ ]
A. to examine your eyes
B. to have your eyes examined
C. to have examined your eyes
D. to be examined your eyes
2010年全国应急救护知识普及率为（）。
A.0.1
B.0.05
C.0.03
D.0.01
