A:9
B:8
C:5
D:4
-- Tu Youyou received the Nobel Prize for her ________ of anemisinin(青蒿素).
-- And she was the first Chinese who won the prize in science.
(1)计算:3-20-27+3tan60°;
(2)先化简再求值:求(2x+y)(2x﹣y)﹣(2x+y)2+2y2的值,其中x=32y=-13.
选择恰当的词语搭配。
新奇的____ 想法
有趣的____ 回忆
奇怪的____ 动作
美好的____ 网络