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

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

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.

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

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

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

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

contractile ring（收缩环）

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

While watching television, _______. A: the doorbell rang B: we heard the doorbell ring C: there was someone knocking at the door D: the doorbell was ring