问题
问答题 简答题
压力为80cmHg时,气体之体积为1000cm3,如温度不变,而体积增至2000cm3,问压力应为多少?
答案
参考答案:
压力为80cmHg时,气体之体积为1000cm3,如温度不变,而体积增至2000cm3,问压力应为多少?
参考答案:
完形填空。 | ||||
Let's look at a fly, and see where it flies. First, it flies out 1 the window. 2 , it stands on 3 dirty things in the street, and then it flies back to the house and walks over your 4 . When a fly walks on the dirty things in the street, its 5 have got some germs 6 them. When the fly walks on your food with its dirty feet, it 7 the germs on your food. What can you 8 this? First, we learn that we mustn't leave dirty things in the street or on the ground near 9 . Second, we learn that all food must be covered so that flies may not 10 it. Third, we learn that flies often carry germs and we must kill them as soon as we see them. | ||||
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