题目：
In order for the automatic lifeboat drain to operate properly（）.
A.the cap should be removed to drain the boat when it is waterborne
B.the cage must be free of rubbish or the ball may not seat properly
C.there is an automatic ball check located in a siphon tube
D.the small lever to release the rubber ball float must be turned counterclockwise
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错解析：意志行动的目的性特征是人与动物的本质区别。
