2. 职称英语
  3. Careful testing is necessary before any more experiments can continue with the e

Careful testing is necessary before any more experiments can continue with the e

游客2023-12-27  25
问题 Careful testing is necessary before any more experiments can continue with the exploring submarine.
选项 A、needful
B、in need of
C、necessity
D、of necessity
答案 D
解析 近义词辨析necessary必要的，必需的，必然的；而A．needful必要的，需要的；B．in need of需要；C．necessity必要性，需要，必需品；D．of necessity必要性，需要，必需品；尽管几个词都有“必要”之意，但用法不同：be necessary是指某事(物)是必要的；needful主要指“必须的，需要的”，例：to do what is needful做必须做的事；有时它有necessary之意，如：needful expenditure必要的支出；in need of指某人或某事由于处在困境而需要帮助、建议、金钱等，例：This project is in urgent need of funding．这个项目急需资金；necessity是名词，表“必要性，必需品”，例：Water is a necessity of life．水是生命必不可少的(在此不定冠词a不能省略)。Food and clothing are necessities of life．食物和衣服都是生活的必需品。而be of necessity的作用即是necessary；类似的用法有很多，如：be of importance=be important；因此D为答案。
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