在坩埚壁上难以洗净的残炭用()的办法可以剥落。
A、洗衣粉刷
B、洗液洗
C、灼烧坩埚
D、盐酸浸泡
参考答案:C
8名新生儿的身长(cm)分别为58,50,51,52,54,55,54,53,其中位数为()。
A.53.5
B.54
C.53
D.52
E.54.5
Many citizens urged their government to take measures to cut _______ their carbon emission to reduce greenhouse effects.
A.off
B. up
C. out
D.down