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【单选题】

Can you imagine life without French fries (炸薯条) Potatoes are very popular today. But in the past this was not true. Potatoes grew in South America five thousand years ago. But they only became popular in other places two hundred years ago.
In the 1500s, the Spanish took the potato from South America to Europe. But the people in Europe did not like this strange vegetable. Some people thought that if you ate potatoes your skin would look like the skin of a potato. Other people could not believe that you ate the underground part of the plant. So they ate the leaves instead. This made them sick because there is poison (毒性) in the leaves.
In the 1800s, people in other parts of the world started to eat potatoes. In Ireland, potatoes became the main food. Then, in 1845, a disease killed all the potatoes in Ireland. Two million people died of hunger.
Today, each country has its own potato dish. The German people eat potato salad, and the United States has the baked potato. And, of course, the French invented French fries, which are now popular all over the world. Why did two million people died in Ireland in 18457

A.
They had nothing to eat.
B.
They ate the bad potatoes.
C.
They ate the potato leaves.
D.
They got a terrible disease.
题目标签:毒性
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举一反三

【单选题】除哪项外均无毒性

A.
雄黄
B.
芒硝
C.
浮海石
D.
滑石
E.
炉甘石

【单选题】病毒性肝炎急性期病人最恰当的饮食是

A.
高蛋白、高碳水化合物饮食
B.
高热量、低脂饮食
C.
高蛋白、低脂饮食
D.
高碳水化合物、高维生素饮食
E.
清淡、易消化的饮食

【单选题】毒性最强的局麻药是()

A.
普鲁卡因
B.
卡波卡因
C.
利多卡因
D.
丁卡因
E.
布比卡因

【单选题】药物对动物急性毒性的关系是

A.
LD50越大,毒性越大。
B.
LD50越大,毒性越小。
C.
LD50越小,毒性越小。
D.
LD50越小,越容易发生过敏反应。

【单选题】乙型病毒性肝炎采取的是

A.
严密隔离
B.
呼吸道隔离
C.
消化道隔离
D.
抗酸杆菌隔离
E.
血液-体液隔离