2. 外语
  3. Leptin is effective in reducing weight but it’s many years away before humans can use it. Dr. Friedman never found the gene tha

Leptin is effective in reducing weight but it’s many years away before humans can use it. Dr. Friedman never found the gene tha

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问题 Leptin is effective in reducing weight but it’s many years away before humans can use it.
Dr. Friedman never found the gene that was believed to control weight. Instead, he found leptin.
选项 A、Y
B、N
C、NG
答案B
解析 文中说“Friedman．．．pinpointed the ob gene”(见文章第三段第四句)。可知Dr．Friedman已经找到了ob gene。
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