曲线y=2x2在点P（1，2）处的切线方程是 [ ]
A．4x﹣y﹣2=0
B．4x+y﹣2=0
C．4x+y+2=0
D．4x﹣y+2=0
答案：A
---Can __________ work out the problem?
---__________, I think. It is too hard.
A．anyone, No one
B．someone, Nobody
C．anyone, Someone
D．someone, None
心脏骤停首选的治疗措施是
A．心肺复苏B．安置起搏器C．开通静脉输液D．通畅呼吸道E．高浓度吸氧
