• 2022-06-12
    18
    A: They are mostly durable.
    B: They are easily disposable.
    C: They serve multiple purposes.
    D: They benefit the environment.
  • C

    内容

    • 0

      To serve different application purposes, input devices can be classified into five types.

    • 1

      Although these changes _________ us, they may have negative impacts on the environment. A: harm B: hurt C: damage D: benefit

    • 2

      They will help the company more easily __________ different regions of China. A: service B: search C: serve D: secure

    • 3

      When you do presentations, you should use discourse markers to serve the following purposes except __________.

    • 4

      Early physician-researchers such as Galen undertake animal experiments mostly for exploratory purposes to describe the inner workings of animals. </p></p>