下列哪位航海家首次实现了人类环绕地球一周的航行,证明地球是一个球体[ ]
A.麦哲伦
B.郑和
C.哥伦布
D.马可波罗
答案:A
You’d better have a talk with your friend _____, and then the misunderstanding will disappear.
A.side by side
B.hand in hand
C.face to face
D.arm in arm
刨料:门窗扇的边梃,上冒头也可先刨三面,靠框的一面待安装时可根据逢大小再进行()。