16 Cat urine glows under a black-light.
猫尿能在黑光灯下发光。
17 Dogs and cats, like humans, are either right or left handed.
猫狗和人一样也有左、右撇子之分。
18 One in every 4 Americans has appeared on television.
每4个美国人中,就有一个人上过电视。
19 Dolphins sleep with one eye open.
海豚睡觉睁一眼闭一眼。
20 The placement of a donkey's eyes in its head enables it to see all four feet at all times.
驴子眼睛的位置能让它随时看到自己的四条腿。