• 2022-05-29
    Iron and steel are flexible. But they are not as flexible ______ rubber. A) as C) to B) for D) by
    A: Iron and steel are flexible. But they are not as flexible ______ rubber.
    B: as
    C: for
    D: to
    E: by
  • A

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      Natural rubber usually is much stronger and harder than vulcanized rubber. A: 正确 B: 错误

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      中国大学MOOC: Natural rubber usually is much stronger and harder than vulcanized rubber.

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      engaged A: busy B: occupied C: flexible D: professional

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      Steel is not as _____ as cast iron; it does not break as easily.

    • 4

      Some of the employees in the company are _______ to work at flexible hours.