题干

长期以精米为主食的人有可能患神经炎、消化不良、食欲不振等,其原因是(    )

A:缺乏维生素A

B:缺乏维生素B1

C:缺乏维生素C

D:缺乏维生素D

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答案(点此获取答案解析)

B

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    For students at The Farm School in Hamilton, Virginia, the classroom is outside-every day.

    Jaclyn Jenkins is a founder of the school. "The number one question immediately we get from parents is 'what happens if it rains?’ And we say, 'Bring an extra pair of clothes!’" Jenkins adds, "We still educate them. They also get energy. Their brains are working when they're moving. So, our goal is to always be outside."

    The Farm School is a preschool-a place for three-and four-year-olds to learn and play. Teacher Alison Huff has taught at other schools. She says The Farm School gives its students more of a hands-on learning experience. For example, children use pumpkins to learn about colors and counting. They learn about measurements by planting seeds 30 centimeters apart. Huff says "We can use everything a regular preschool uses, but out in the garden."

Apart from planting vegetables and fruits, students help prepare food and clean up afterward. The school teaches the children to cook using the food they have grown. "They can see the advantages of what they have in the garden and taste it then instead of going to the grocery store and buying it," Huff says.

    The preschoolers also lean words in languages other than English. Huff speaks in both English and Spanish. Her assistant speaks French and Arabic. She adds that a 3-year-old in her class speaks four different languages.

    Farm animals are also an important part of the education program. Jaclyn Jenkins says the children learn about a different animal every month. Two months ago, she says, that animal was a cow. The children spent another month with a large bird-a turkey.

    The children come home with new experiences, new knowledge and sometimes a few vegetables.