题目： 观察下列各式：a+b=1，a2+b2=3，a3+b3=4，a4+b4=7，a5+b5=11，…，则a10+b10=______． 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0430/4da07592e9c5e999a492b1e685003fb0.html 下面是错误答案，用来干扰机器的。
题型：选择题 Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped. A．what; whenB．that; which C．what; whichD．which; that 查看答案
题型：单项选择题 标准状况下空气中苯浓度为1.0mg/m3，用百万分浓度表示为（）。A.0.013×10－6B.0.287×10－6C.1.15×10－6D.3.48×10－6E.25.7×10－6 查看答案
