What do forests give us?
A、Produce fresh oxygen.
B、Purify water and air.
C、Provide people with jobs.
D、Help in regulating temperature and rainfall.

两弹一星是指原子弹、氢弹和东方红卫星

未知题型两弹一星是指原子弹、氢弹和东方红卫星

A cultural difference could be a difference in______ ...

多项选择题A cultural difference could be a difference in______
A、race
B、religious belief
C、geographical region
D、nationality

什么叫做“大数据”？

问答题什么叫做“大数据”？