确定各自治地方行政区域的主要根据是()。
A、民族成份
B、民族分布
C、民族关系
D、历史状况
参考答案:B, C, D
---Do you think he will do me a favor?
---As far as I know, he is the last one ___ others. He ___ be prepared to give you a hand, though.
A.to help, might
B.helping, must
C.to help , can
D.helping, should
在下列同厚度采光材料中,何者透射比最大?
A.钢化玻璃
B.有机玻璃
C.磨砂玻璃
D.普通玻璃