当事人约定由第三人向债权人履行债务的，若第三人不履行债务，则_爱下问搜题

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问题单项选择题

当事人约定由第三人向债权人履行债务的，若第三人不履行债务，则( )。

A．债务人应当向债权人承担违约责任
B．第三人应当向债权人承担违约责任
C．债务人和第三人共同向债权人承担违约责任
D．债权人选择确定承担违约责任的主体

答案

参考答案：A

解析：当事人约定由第三人向债权人履行债务的，若第三人不履行债务，则债务人应当向债权人承担违约责任。

完形填空

阅读下面的短文，根据短文中的信息完成文后的表格（每空一词）
Do you know how to keep fish at home?
The fish need room(空间). They must not be crowded（拥挤）. Fish need oxygen(氧气). Fish get it from water in the tank. There must be enough water for all fish in the tank. So the size of the tank is important..
In the tank many people put small plants. They give oxygen to the water. Plants help in other ways, too. Fish can nibble(轻咬)on the plants. They hide in the plants and sleep, lay eggs there.
Both the plants and fish need light. You can put it near a window. It will get light there. But remember: a window may let cold air in. The cold can kill(杀死) your fish. Too hot water can kill your fish, too.
The fish need food and you should feed them every day. Giving them too much food is bad. It will make the water dirty. However, the fish should get just enough food. They should finish the food in 10 minutes. No extra(多余) is left. When this happens, the amount(数量)of food is right.
How to keep fish at home

Advice	_______小题1:_____
1.The ___小题2:___ of the tank is important	Fish need enough room because they will be crowded in a small tank. They need __小题3:____ water because they get oxygen from it.
2.You can put small plants in the tank	Plants can give oxygen to the water, they also give a ____小题4:___ to fish to hide, sleep and lay eggs
3.You can put the tank ___小题5:___ a window, but don’t let cold air in.	Light is __小题6:____ for fish and plants. It can get in through the window. But you shouldn’t ___小题7:__ cold air can also get in and cold air will kill your fish.
4.Feed the fish every day but not too ____小题8:__	Too much food makes water ____小题9:___ easily. When fish can finish ____小题10:___ food in 10 minutes, the amount of food is right.

判断题

外阴 * * 假丝酵母菌病久治不愈需查尿糖及血糖，警惕有糖尿病。()