A:东北
B:西北
C:西南
D:东南
用恰当的单词填空完成表格。
College students volunteer in the US
In ____
They ____books to the sick people or listen to their problems.
In old people's homes
They help to clean up or go ____.
In the ____clubs
They remember the problems of boys and girls
吴桥杂技在国际上多次____,为祖国赢得了____。每当我们站在高高的领奖台上时,感到非常的自豪。
对下列实验中出现的异常现象分析不合理的是( )