4.由水准尺不直立、水准仪下沉、尺垫下沉所产生的误差性质( )
A. 系统误差、系统误差、系统误差
B. 偶然误差、系统误差、偶然误差
C. 偶然误差、偶然误差、系统误差
D. 系统误差、系统误差、偶然误差
查看答案
7.对三角形进行5次等精度观测,其真误差(闭合差)为:+4″;-3″;+1″;-2″;+6″,则该组观测值的精度( )
A. 不相等;
B. 相等;
C. 最高为+1″
D. 无法计算
Why did the waiter Somsak say "special place for special people" to Miss Stewart?
A. Because Miss Stewart often come to the cafe, so he knows her well.
Because he saw Miss Stewart came in with a friend,so he creat a welcome atmosphere.
C. Because Miss Stewart hadn't been to to the cafe for a long time.
D. Because Miss Stewart often make special order cakes there.
What order did Miss Stewart and her friend Harrytake?
Aglass of ginger ale with ice.
B. California chablis.
C. Mee krob.
D. Bubbing wine.
What does Miss Stewart do?
A. The sales manager of ashoes company.
B. The vice-president of a new toy company.
C. Theresearch and development manager of an internet company.
D. The accountant of a construction company.
微信支付 
支付宝支付