2. 医学
  3. We now obtain more than two-thirds of our protein from animal sources, while our grandparents ________only one-half from animal

We now obtain more than two-thirds of our protein from animal sources, while our grandparents ________only one-half from animal

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问题 We now obtain more than two-thirds of our protein from animal sources, while our grandparents ________only one-half from animal sources.
选项 A、originated
B、digested
C、deprived
D、derived
答案D
解析 题干：现在我们从动物中获取了三分之二的蛋白质，而我们祖父母那一代的蛋白质只有一半是从动物中获取的。derive得自；deprive剥夺，使丧失，常见搭配为deprive sb.of sth.句型。originate发源；digest摘要，消化。根据题意，D为正确选项。
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