中比例尺地形图由国家专业测绘部门负责测绘,一般采用( )测绘。
A.航空摄影测量方法
B.平板仪
C.经纬仪或全站仪
D.GPS
参考答案:A
根据句意和首字母提示完成单词。
1. —Let's play tennis.
—That sounds b___________
2. We have many s___________ clubs in our school .
3. He has 5 v ____________.
4. That sounds r ___________.
5. These questions are very d _______________.
PYP拥有一个下列哪种有机键()。
A.P-C-P键
B.P-O-P键
C.P-S-P键
D.P-N-P键
E.P-H-P键