_______（不幸地） , they had no money for their mother's medical treatment.
-Could you tell me_______？-Until tomorrow afternoon.
A. how long you will stay there
B. how soon you will stay there
C. when will you stay there
D. how often will you stay there
下面是三个小组丈量距离的结果，只有（）组测量的相对误差不低于1/5000
A. 100m 0.025m
B. 200m 0.040m
C. 150m 0.035m
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