水准仪上圆水准器的作用是()。
参考答案:使竖轴铅垂
— Jim can play _______ soccer very well. What about you?
— I can play _______ piano very well. [ ]
A. /; the
B. /; /
C. the; /
我们在处理国际关系中,倡议并实行的和平共处五项原则是什么?