题目

There are two     51     types of memory. Long-term memoryProcedural memory involves the     52     of learned skills, like typing or     53     a car. Declarative memory is where factual information is     54    . Short-term memoryIt is used to     55     what is going on at the present time. 答案：51. main               52. use                53. driving            54. stored                   55. record “南国汤沟酒，开坛十里香”，这句广告词说明了 （      ） A．分子是由原子构成的　           　   B．分子间是有间隔的 C．分子是不断运动的　　          　   D．原子是化学变化中的最小粒子