从右栏中找出左栏的答语。

①Where is Jane? ____                                  A. Three weeks.

②What are they doing? ____                        B. Yes, he is.

③Would you like to play soccer? ____           C. She is in the lab.

④How long can I keep it? ____                     D. Good idea!

⑤Is Tom having lunch at home now?____      E. They are dancing.

a试管、b漏斗、c酒精灯、d集气瓶、e广口瓶、f胶头滴管、g量筒（10mL，50mL，100mL）、h药匙、i石棉网、j试管刷   等仪器，请为下列实验操作各选一种．（用序号填空）

下面句中划线词语能否删除，为什么？

在太空中，我花了将近一个月的时间，才算完全适应了做一个太空人。

下列关于氧气的说法正确的是