为了测量出学校旗杆的高度,同学们找来了一根长8分米的木棍立在旗杆旁,发现木棍的影长是6分米,同时又发现旗杆的影长是7.5米,你能求出旗杆的高度吗? 答案:解:设旗杆的高度为x米 8:6=x:7.5x=8×7.5÷6x=10 答:旗杆的高度是10米。
Could you tell me ________ ?
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A.what is the machine used for
B.where was the police station
C.how long you had lived here
D.when you came back