2. 外语
  3. Beta-endorphin is a natural opiate which increases pain tolerance, counters stress and imparts a feeling of well-being.

Beta-endorphin is a natural opiate which increases pain tolerance, counters stress and imparts a feeling of well-being.

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问题 Beta-endorphin is a natural opiate which increases pain tolerance, counters stress and imparts a feeling of well-being.
选项 A、destroys
B、suppresses
C、gives
D、secretes
答案C
解析 C项give“给予，传授”。译文：β一内啡肽是一种天然鸦片，它可以增强对疼痛的耐受力，缓解紧张情绪，并给人一种安全感。A项destroy“毁坏”；B项suppress“抑制，镇压”；D项secrete“隐藏”。
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