问题
问答题 简答题
什么是急性毒作用带？有何意义？
答案
参考答案：
急性毒作用带通常以LD50/Limac的比值表示，急性毒作用带=半数致死量/急性毒性最小有作用计量，此比值越大，毒性的急性渡作用带越宽，则急性最小有作用量与可能引起半数死亡的计量的差距就越大，说明该毒物引起的急性致死性中毒的危险性越小；反之，比值越小则引起致死性中毒的危险性就越大。
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什么是急性毒作用带？有何意义？
参考答案：
急性毒作用带通常以LD50/Limac的比值表示，急性毒作用带=半数致死量/急性毒性最小有作用计量，此比值越大，毒性的急性渡作用带越宽，则急性最小有作用量与可能引起半数死亡的计量的差距就越大，说明该毒物引起的急性致死性中毒的危险性越小；反之，比值越小则引起致死性中毒的危险性就越大。
Harbin is the capital city of Heilongjiang Province. It lies the northeast of China. It’s a very beautiful city. It’s “Paris in the east. ” or “Ice City”. It’s the political, economical and cultural center of Heilongjiang. The summer here is short and cool the winter here is long and very cold. Every year, there is an ice and snow festival. People all over China and foreign guests from other parts of the world come here to the festival. The sun island is the most attractive(吸引人的) place of interest Harbin. We often go there to relax . The city is historical and modern. It has many buildings of style and many modern buildings, too. For example, Saint Sofia church and Dragon Tower, they are the best places . The Songhua River is very famous the foreigners, you can boat and fish on it. As a developing city, some great changes are taking place. I believe the city will be better in the future.
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