A:-92
B:92
C:2
D:-2
2016年9月26日,我国自主设计建造的世界最大球面射电望远镜落成启用.该望远镜理论上能接收到13 700 000 000光年以外的电磁信号.数据13 700 000 000光年用科学记数法表示为____光年.
照样子,写词语。
高高兴兴 ____ ____
—What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don't know _______ of them.