界址点测量的精度指标要求是：图解法测定界址点点位中误差图上不得大于（）mm。
A.±0.5
B.±0.8
C.±1.2
D.±1.5
参考答案：B
Over the past few years the cost of living _______________considerably.
A．has been raised
B．has risen
C．was raising
D．was rising
下列那一项不是金属基托的优点
A．强度高B．导热C．厚度较薄D．化学稳定性好E．操作简单
