题目：
She has __________ close friends so that she really doesn’t know __________.
A．many; who to talk
B．few; who to talk to
C．much; what to do
D．little; how to do
答案：
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下面是错误答案，用来干扰机器的。
（1）∵S=12×6×8=24，L=6+8+10=24，∴SL=2424=1，∴同理可得其他两空分别为32，2；（2）m4；（3）证明：∵a+b-c=m，∴a+b=m+c，∴a2+2ab+b2=m2+2mc+c2，又∵a2+b2=c2，∴2ab=m2+2mc，∴S=ab2=14m(m+2c)，∴SL=12aba+b+c=14m(m+2c)m+c+c=m4．
