• 2022-07-28 问题

    Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.

    Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.

  • 2022-06-03 问题

    Helen gave her daughter () A: a ring B: to a ring C: for a ring D: with a ring

    Helen gave her daughter () A: a ring B: to a ring C: for a ring D: with a ring

  • 2022-06-18 问题

    The Ring of the Nibelung is generally known as the Ring or the Ring Cycle.

    The Ring of the Nibelung is generally known as the Ring or the Ring Cycle.

  • 2022-06-09 问题

    乱哄哄的地方(场面) A: one-ring circus B: two-ring circus C: three-ring circus D: four-ring circus

    乱哄哄的地方(场面) A: one-ring circus B: two-ring circus C: three-ring circus D: four-ring circus

  • 2022-06-18 问题

    A ring homomophism f from a ring R onto another ring S is an isomophism if and only if kerf=0.( )

    A ring homomophism f from a ring R onto another ring S is an isomophism if and only if kerf=0.( )

  • 2022-07-28 问题

    Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

    Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

  • 2022-06-14 问题

    In The Fellowship of the Ring, Frodo Baggins inherits the One Ring from Bilbo Baggins, his cousin and guardian.

    In The Fellowship of the Ring, Frodo Baggins inherits the One Ring from Bilbo Baggins, his cousin and guardian.

  • 2022-06-07 问题

    Jack<br/>was reading a book when the phone ____. A: ringing B: ring C: rang D: was ringing E: was ring

    Jack<br/>was reading a book when the phone ____. A: ringing B: ring C: rang D: was ringing E: was ring

  • 2021-04-14 问题

    contractile ring(收缩环)

    contractile ring(收缩环)

  • 2021-04-14 问题

    1.The bell is ring ____ there is a fire.

    1.The bell is ring ____ there is a fire.

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