﹣27的立方根是 _________ ．

李先生转让一幢3年前自建的洋楼，其转让该洋楼所得的收入为450万元，此洋楼实际发生的建造费用及建造和取得产权时实际缴纳的相关税费为250万，李先生按照规定实际支付的住房装修费用、住房贷款利息、手续费、公证费等费用合计105万，有关税金为45万。

根据上述资料，回答下列问题：

李先生应缴纳的个人所得税税额为()万元。

A.0 

B.2.5 

C.5 

D.10

C

A famous teacher was speaking to the students at our school. He began his lesson by holding up a $100 bill. Then he said to the three hundred students, "Who would like this $100 bill" The students began to put up their hands at once.

Then he said, "I am going to give this $100 to one of you, but first, let me do this. " He then made the bill into a ball. Then he said, "Who wants it now" The hands went back into the air.

"Well," he said, "What if I do this" and he dropped it on the floor and stepped on it. He picked up the dirty, crumpled bill and said, "Who still wants it" Hands went back into the air.

"My friends," he said, "you have learned a valuable lesson today. No matter (无论) what I did to the money, you still wanted it because it did not go down in value (价值). It was still worth $100!"

Many times in our lives, we are dropped, crumpled, and stepped on by the chances we take and the things that happen to us. We feel as if we are worth nothing. But remember, no matter what has happened to yon, you will never lose your value: you are always valuable to those people who love you. Your value doesn’t come from what you do or whom you know, hut WHO YOU ARE.

You are special and valuable. Don’t ever forget it!

Even though it was dirty, the money（）.

A．still went up in value

B．was worth nothing

C．didn’t go down in value

D．was still ours

尿闭患者入院时留置导尿管，2d后出现低血压和发热，尿中有大量白细胞和细菌。血气分析：pH7.32，PaO₂80mmHg（10.7kPa），PaCO₂20mmHg（2.67kPa），HCO₃10mmol/L。

关于代谢性酸中毒合并呼吸性碱中毒的特点，叙述正确的是（）

A.PaCO₂和HCO₃浓度均降低，且均小于代偿的最低值

B.SB、AB、BB均降低，AB＜SB

C.BE负值增大

D.AG减小

E.pH变化不大

F.BE正值增大

关于锅炉给水箱的说法正确的是( )。

A．按锅炉房额定蒸发量时的20～60min给水量确定
B．不能与软化水箱共用
C．布置于锅炉上方
D．不能以除氧水箱替代

斯巴达教育的目的是把学生培养成体格健壮、恭顺服从、效忠国家的（）。