下列措施严重阻碍社会向前发展的有( )
①科举制的创立 ②焚书坑儒 ③八股取士 ④文字狱 ⑤闭关锁国政策
A:①②③④⑤
B:②③④⑤
C:①②③④
D:①②③
试管内装有一定量的植物油,加入下列哪组消化液后,经充分振荡和适宜条件下的静置,植物油能被彻底分解?( )
-- I want to teach in Tibet when I graduate from the college.
-- Me too. Teachers __________ very much there.