問題詳情：
閲讀理解
請認真閲讀下列短文，從短文後各題所給的A、B、C、D四個選項中，選出最佳選項。
There are some facts about sweet potatoes you probably don’t know.
First Found in American Countries They’re in the family of plants that includes morning glories（牽牛花）and are in a different family than yams（山*）. Yams are from Africa and are more closely related to lilies（百合花）. | A 5000-Year-Old Food When Christopher Columbus arrived in American countries in the 15th century，sweet potatoes were already a mian crop. He took some with him back to Spain and by the 16th century，gardens all over Europe were growing them. |
A Healthy Choice White potatoes may be cheaper than sweet potatoes but sweet potatoes have more nutritonal（營養的）value. Also，white potatoes can lead to blood sugar problem and some other health problems.
| Health Facts ◆A Rich Source of Beta-Carotene（β-胡蘿蔔素） This powerful Beta-Carotene gives sweet potatoes their yellow，gold，or orange coloring and changes to vitamin A in your body. It’s thought to reduce the risk of certain types of cancer and provide protection against heart disease. ◆High in Fiber(纖維) ，Low in Fat Sweet potatoes are high in fiber which is great for health. Also，they contain very little fat. |
1. What can we know about sweet potatoes from the passage?
A. Sweet potatoes were first found in Africa.
B. The family of sweet potatoes includes yams.
C. Sweet potatoes are from American countries.
D. Sweet potatoes are closely related to lilies.
2. From the passage we know that .
A. sweet potatoes have a history of 5000 years
B. Columbus was the first to find sweet potatoes
C. white potatoes are cheaper but more valuable
D. sweet potatoes often cause health problems
3. Sweet potatoes are good to people because they are rich in .
A. fat B. vitamin A C. sugar D. Beta-Carotene
【回答】
1.C
【解析】細節理解題。由第一個表格的標題“First Found in American Countries”可知最先在美洲國家發現甘薯，故選C。
2.A
【解析】細節理解題。由第二個表格第一句話“When Christopher Columbus arrived in American countries in the 15th century, sweet potatoes were already a main crop.，在哥倫布到底美洲國家前，甘薯已經是主要農作物”。故B選項表述有誤。由第三個表格“but sweet potatoes have more nutritional(營養的) value. Also, white potatoes can lead to blood sugar problem and some other health problems.但是甘薯由更高的營養價值，白薯還可能到時糖尿病或其它健康問題”，故C、D兩項表述有誤；根據第二個表格標題可知白薯已經5000年的歷史，故選A。
3.D
【解析】細節理解題。由第四個表格中的“A Rich Source of Beta-Carotene.”可知，甘薯富含對人體有益的胡蘿蔔素，及Beta-Carotene，故選D。
知識點：日常生活類
題型：閲讀理解
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