A:
B:
C:
D:
近年,日本加速扩大海外投资,投资建厂的主要对象是
在图中标出通电螺线管的N极.
British people say "please" and "thank you" all ______ time, and they always keep their voice down in ______ public.
①太阳 ②电灯 ③萤火虫 ④白墙 ⑤流星 ⑥月亮.