2002年，湖南龙山县里耶镇出土了3 7万枚秦代简牍，这些简牍是 秦代地方官府

为什么说全血并不“全”

投保人申报被保险人年龄不真实，并且其真实年龄不符合合同约定年龄限制的，在合同成立后的2年内，保险人有权（）。

A.解除保险合同，并在扣除手续费后退还保险费

B.解除保险合同，向投保人退还保单现金价值

C.及时进行调整，要求投保人补缴少缴的保费或退还多收的保费

D.在合同约定事故发生时按投保人实付保费与应付保费比例调整保险金给付额

图中轻质杠杆AB可绕固定点O在竖直平面内转动， AO∶OB＝1∶2，系在杠杆B端的细绳通过滑轮组悬挂着重300N的物体甲。重500N的人站在水平地面上用力举起横杆A端，恰好使杠杆AB在水平位置平衡，他对水平地面的压力为N1，他对地面的压强为p₁。若在物体甲下面再加挂物体乙，杠杆AB仍水平平衡，此时人对水平地面的压力为N₂，他对地面的压强为p₂。已知：各滑轮规格完全相同，且重均为100N， | N1- N2|=100N。不计绳重与轴摩擦。则p₁与p₂之比为_________。

One day a rich woman lost her purse with a lot of money in it. So she made a (1) , "If anybody finds my purse and (2) it to me, I’ll give half the money to him."A poor man (3) the purse near a shop. He sent it back to the woman, but the rich woman (4) . "There was an expensive ring in my purse besides money," said the woman, "I won’t give you half the money in my purse until you return it to me." "But I’ve never seen an expensive ring in (5) purse," said the man.They began to quarrel. The man became (6) and took her to a judge. (7) the judge heard what had happened to them, he said to the woman, "I’m sure that you have lost a purse, and there is an expensive ring in it. But there is (8) a lot of money in this purse. So I don’t think it’s yours. (9) some time. Maybe somebody will give your purse back."Then the judge (10) to the man and said, "Take the purse home. If the owner doesn’t come to get it back in two days, it will be yours.

第（8）空应选择（）

A．only

B．truly

C．nearly

D．really

简述债的逾期履行和提前履行。