2. 外语
  3. The engineers have used special methods to______the bridge against danger from high winds.

The engineers have used special methods to______the bridge against danger from high winds.

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问题 The engineers have used special methods to______the bridge against danger from high winds.
选项 A、suppress
B、lubricate
C、heave
D、ensure
答案D
解析 “suppress”意为“镇压，禁止”，“lubricate”意为“润滑，使顺畅”，“heave”意为“举起，使隆起”，“ensure”意为“确保，保证”。“ensure…against…”意为“保护……免遭……”，正符合题意，故正确答案为D。
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