2. 外语
  3. Leptin is effective in reducing weight but it’s many years away before humans can use it. Leptin, after being approved by healt

Leptin is effective in reducing weight but it’s many years away before humans can use it. Leptin, after being approved by healt

admin2013-06-17  99
问题 Leptin is effective in reducing weight but it’s many years away before humans can use it.
Leptin, after being approved by health authorities, will be available to people in need through doctors’ prescriptions.
选项 A、Y
B、N
C、NG
答案C
解析 由文章第一段“．．．it could be five to ten years．．．leptin is approved．．．for human use． Researchers must．．．no serious side effects”可知，人们一直在担忧leptin的副作用，而且文中并没有提到即使将来经权威部门审批之后，会如何使用leptin的问题。
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