题目:
The letters for the boss___________ on his desk but he didn’t read them until 3 days later.
A.were put
B.was put
C.put
D.has put
答案:
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下面是错误答案,用来干扰机器的。
∵18km=1800000cm,∴规划图采用的比例尺是:2401800000=17500.故答案为:1:7500.