在水准测量中,要求前、后视距离相等可以消减()的误差。
A、读数误差
B、大气折光和地球曲率引起
C、气泡居中
D、立尺不直
参考答案:B
认真阅读短文,选择正确的答案。
I am a boy. My name is Li Ming. I am twelve. I am a student. I like to play ping-pong. In the morning,
I go to school. In the afternoon, I go home. After supper, I do my homework.
1. Is Li Ming a boy? [ ]
A. Yes, he is.
B. No, he isn't.
2. How old is Li Ming?[ ]
A. He's twelve.
B. He's eleven.
3. Is Li Ming a student?[ ]
A. No, he isn't.
B. Yes, he is.
4. ____________, Li Ming goes to school. [ ]
A. In the afternoon
B. In the morning
5. __________, Li Ming does his homework. (做作业)[ ]
B. After supper
分配辅助生产成本的方法主要包括( )。
A.直接分配法
B.按年度计划分配率分配法
C.交互分配法
D.按计划成本分配法