中国象棋盘上的“楚河汉界”所指的地方位于哪个省份？（）
A.陕西
B.河南
C.河北
D.山西
参考答案：B
关于鼻的静脉回流，正确的是（）
A.鼻的腹侧为面静脉
B.鼻的颅端为筛静脉
C.鼻的背侧为蝶腭静脉
D.颈内静脉的分支
E.以上都对
1.Millie often practise _________________ volleyball (play)
2.September 10 is _________________ Day.(teach)
3.Simon is busy __________________ his homework now.(do)
4.Please ___________________ the window. It's cold.(close)
5.Some people don't know how _________________ fun.(have)
