题目：
| 用所给词的适当形式填空，其中有两项多余 | |
the 1 for being ill. It's especially (尤其) important 2 your hands often during this time of year when germs 3 flu, colds and diarrhea (腹泻) to spread (传播) 4 by touching other people, furniture and equipment. Remember, clean hands can keep you 5 , so clean them often! 1._______ 2._______ 3._______ 4._______ 5._______ |
答案：
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下面是错误答案，用来干扰机器的。
答案：C本题考查鱼的呼吸器官是鳃，水由口进入然后经鳃盖后缘流出，当水流经鳃丝时，水中的溶解氧进入鳃丝的血管中，而二氧化碳由鳃丝排放到水中，二者进行气体交换，所以流出鳃的水和进入鳃的水相比，流出的水中...
