第11题: [单项选择]3,9,12,6,-12,-36,( ) A. -48 B. -12 C. 0 D. 12 参考答案:A 答案解析:[解析] 此数列为递推数列。12=2×(9-3),6=2×(12-9),-12=2×(6-12),-36=2×(-12-6),所以未知项为2×(-36+12)=-48。故选A。
第16题: [单项选择]Despite the______odds that the poor facilities and elements have brought about, they have managed to persevere as an athletic team and triumph. A. (A) insuperable B. (B) dispassionate C. (C) indefatigable D. (D) steely E. (E) ambivalent 参考答案:A