二级水准观测的仪器检验后,i角不得大于()。
A.10’’
B.15’’
C.20’’
D.30’’
参考答案:B
One of our rules is that every student wear school uniform while at school.
A. might
B. could
C. shall
D. will
所有组织都有三个共同的特征:明确的目标.严格的财务管理和技术。()