用98%、密度为1.84g/cm 3 的浓H 2 SO 4 配制1mol/L的稀硫酸90mL,下列仪器必须使用的是: ①100mL量筒;②10mL量筒;③50mL烧杯;④托盘天平;⑤250mL容量瓶;⑥胶头滴管;⑦玻璃棒;⑧100mL容量瓶 ( ) A ①③④⑤⑥⑦ B ①③⑤⑥⑦ C ①③④⑤⑥⑦ D ②③⑥⑦⑧
【简答题】Read and think about the following statement: The college years are the best time in a person's life. Do you agree or disagree with this statement? Give reasons to support your opinion.