一个实心金属球放在盛满水的杯子里,从杯中溢出10g的水,若把这个金属球放入盛满煤油的杯子里,溢出煤油的质量为 [ ]
A、8g
B、10g
C、12.5g
D、6.4g
答案:A
He is very happy because he will have a holiday and lots of free time. [ ]
A. short
B. large
C. long
D. strong
课程改革就其实质来讲,就是课程()的问题。
A.现代化
B.综合化
C.系统化
D.理论化