①新的机会      ②新的可能     ③新的目标      ④新的挑战

完形填空

       Sometimes it is impossible to deliver（投递）all the mail that arrives at the post office. Perhaps there is an1  mailing address and there is no return address. The post office cannot just   2  the mail, so it becomes “dead mail”. Dead mail is   3to one of the U.S. Post Service’s in Atlanta, New York, and San Francisco. Seventy-five million pieces of mail can be put in these offices in one year.

      There the workers of the dead mail offices have   4 ways to deal with all of these pieces of dead mail. First of all, they look for something  5  that can help them deliver the mail; they open packages, expecting that something   6 will show where the package came from or is going to. Dead mail will also be listed on a   7   so that people can call in and check to see if a missing thing is there on the screen. However, all of this mail cannot simply be   8 forever; there is just too much of it. When a lot of dead mail comes together, the dead mail offices hold public auctions (拍卖). Every three months, some people who are   9   are invited to the offices with objects（物品） found in dead mail packages and they are sold to the  10  bidder (出价者).

为了比较水和食用油的吸热能力，小明用两个相同的装置做了如图所示的实验。用温度计测量液体吸收热量后升高的温度值，并用钟表记录加热时间。实验数据记录如下表。

（1）在实验过程中控制加热时间相同，通过比较____ 来研究水和食用油吸热能力的差异。
（2）在此实验中，如果要使水和食用油的最后温度相同，就要给____ 加热更长的时间，此时水吸收的热量____ （选填“大于”“或”“小于”或“等于”)食用油吸收的热量。
（3）通过实验可以得到不同的物质吸热能力不同，物质的这种特性用____ 这个物理量来描述。