根据《合同法》及相关法律规定，下列关于合同解除的说法中正确的是（）。
A.约定解除是以合同约定当事人一方或双方解除合同的条件，当条件成就时，合同解除
B.协议解除的当事人在行为能力上没有要求和限制
C.约定解除是以一个新合同来解除原订的合同
D.法定解除合同需经对方当事人同意
参考答案：A
解析：本题考核合同的解除。协议解除合同的当事人须具有完全民事行为能力。约定解除是以合同来规定当事人一方或双方的解除权，而协议解除是以一个新合同解除原订的合同。当事人一方依照合同法规定主张解除合同的，应当通知对方。合同自通知到达对方时解除。
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| My daughter has been crazy about raising a pet (宠物) for a long time. Last spring I bought two newly-hatched chickens for her. She got 1 and took good care of them. 2 , a few days later, both chickens died. She burst into tears from 3 , I helped her 4 the two birds under a tree behind our house. I thought it would be the 5 of her ideas. 6 I was wrong. Children are children 7 . The failure hasn't 8 my daughter in any way. She still tried to keep a small animal or even a snail. One day last winter, I noticed under the eaves (屋檐) of the house a family of sparrows. My daughter and I could 9 the sparrows as our "pets", but we didn't. So I told her to 10 the grains in the windowsill. A few minutes later, the sparrows came to land on the windowsill 11 and pecked at the rice. Suddenly my daughter asked me, Mum, can we catch and 12 the sparrows, and let them live with us in the room? How 13 it is for them to live outside? "Oh, my dear, I do not think it's a good idea. You know, "I explained to her." the sparrow is a bird who loves 14 . No one can keep them in a cage. If they are caught, they will 15 quickly. They are 16 to living outside. Moreover, they have warm nest under the eaves." From then on, we have set up a kind of 17 with the sparrow family. We feed them frequently and 18 them as pet birds. However, we do not need to 19 them. We 20 seeing these little birds flying and jumping among branches, leaves and flowers in the spring mornings. | ||||
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