• 2021-04-14
    In _____, Fischer proposed a lock-and-key analogy for enzyme–substrate interactions.
  • 1894

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    • 0

      Xi Jinping proposed “Chinese Dream” and emphasized that ______ is the key strength.

    • 1

      Leave your key with your neighbor _______ you lock yourself out one day.

    • 2

      The key _______ in the lock and the door opened. A: knocked B: clicked C: struck D: hit

    • 3

      The lock on the front door was one which _______. A: needed a piece of wire to open it B: could he opened from inside without a key C: couldn’t be opened without a key D: used a knob instead of a key

    • 4

      Those books were normally kept under______ and key in the library.​​​ A: door B: window C: lock D: bolt