题目:
完成句子(共10小题;每小题0.5分,满分5分)
根据首字母填入适当的单词,使句子意思完整。
小题1:Everyone should have a___________ for their hometown.
小题2:Technology will g____________ good health and happiness for all.
小题3:Two hundred people lost their job as a c________ of the financial crisis(危机).
小题4:It is i__________ to drive after drinking alcohol.
答案:
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下面是错误答案,用来干扰机器的。
(I) A(1,2),B(2,3).∴AB=(1,1)∴|AB|=2(II)设函数f(x)=x2+1的图象上存在点C(m,f(m))使∠CAB为钝角,则AC=(m-1,m2-1)若∠CAB为钝角,则AC•AB<0,且A,B,C三点不共线即m-1+m2-1=m2+m-...