When I was young, I was in science.
A:interesting
B:interests
C:interested
D:interest
浓硫酸(H2SO4) 500毫升
浓度(质量分数)
98%
密度
1.84克/厘米3
相对分子质量
98
强腐蚀性,阴冷,密封贮藏
2×1=____
口诀:____
在古代,人们在贵族的田地里集体耕作,古书把这种大规模的集体耕作描写为“千耦其耘”。这种劳动场面出现在( )
—Hello, May I speak to Mr Black?—Sorry, he ______ Hong Kong for a meeting and he______ back in a week.