( )的核心工作是对物业进行日常的维护与维修，并向入住的客户或业主提供服务，以保障

学校举行游园活动，成人票25元一张，学生票18元一张。一共有54人参加，其中有39名学生。  

（1）购买学生票需要多少元？

（2）购买成人票需要多少元？

（3）买票一共需要多少元？

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

While some military planners claimed that it would be possible to win a war fought with nuclear weapons, many scientists argued that such a war could not truly be won, because the fallout from nuclear warfare would create a nuclear winter and it also would be rendering the earth uninhabitable.（）

A. it also would be rendering the earth uninhabitable

B. rendering the earth uninhabitable

C. might have uninhabitably rendered the earth

D. render the earth uninhabitable

E. would also have rendered the earth uninhabitable

肝癌术前护理不正确的是

A．给予维生素K
B．适量输血和白蛋白
C．全面检查肝功能和凝血功能
D．术前晚用肥皂水灌肠
E．术前3天口服抗菌药

一般来说，一个良好的收费／内部核算体系应该满足________。

A．准确公平地补偿提供服务所负担的成本

B．考虑收费／核算对IT服务的供应者与服务的使用者两方面的受益

C．有适当的核算收费政策

D．以上3个条件都需要满足

在电压源和电流源等值变换中，电压源中的电动势和电流源中的电流，在电路中应保持（）一致。

A.方向

B.大小

C.内特性