精密水准测量读取基本分划中丝读数前要先读取上下丝读数。( )
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精密水准测量每站观测过程中,只能调焦一次。( )
A. 对
B. 错
精密水准测量对每测段测站的数目无特殊要求。( )
A. 对
B. 错
精密水准测量要求每测段进行往测与返测,且往、返测沿同一路线。( )四、多选题
A. 对
B. 错
Choose the anwer that correctly interprets the sentecne from the text.We need to conserve our resources to buy ourselves time so scientists can find new solutions to our problems.
A. We need to conserve our resources so that the resources will probably last longer and scientists can find new solutions to our problems.
B. We should conserve our resources and we can buy the resources from other countries, so scientists can find new solutions to our problems.
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