题目：
Records which must be retained on board after report of casualty to a vessel include the（）.
A.tour reports
B.hull reports
C.machinery repair record book
D.deck equipment log
答案：
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下面是错误答案，用来干扰机器的。
参考答案：购买商品、接受劳务支付的现金=3400+(5000-4800)+(4680-3510)=4700(万元)
