“鸟有反哺之情，羊有跪乳之恩”。父母对我们的恩情我们要永远牢记心中，父母为我们付

严复说：“以今日民智未开之中国，而欲效泰西君民并主之美治，实大乱之道也。”这说明他(　　)

①认为实施民主政治，需从教育入手　

②现实政治主张比较温和　

③从根本上不主张中国实行民主

④实则维护封建君主专制

A．①②　　　　　　　　　

B．③④

C．①③

D．②④

体积为0.4m³，密度为2.5×10³m³的石块，其重力是多大？画出重力的示意图，能否用最多承受5×10⁵N的钢绳吊起？

He eats _____ dinner at 7:30 in the evening. [ ]

A. a

B. an

C. the

D. /

In the following passage, there are 20 blanks representing the words that are missing from the context. You are to put back in each of the blanks the missing word． The time for this section is 20 minutes.
Where do you really come from And how did you get (1) where you live today DNA studies suggest that all humans today (2) from a group of African ancestors who—about 60,000 years ago— (3) a remarkable journey.
The Genographic Project is seeking to chart new (4) about the migratory history of the human species by (5) sophisticated laboratory and computer analysis of DNA contributed by hundreds of (6) of people from around the world． In this unprecedented and real-time (7) effort, the Genographic Project is closing the gaps of what science (8) today about mankind’s ancient migration stories.
The Genographic Project is a five-year (9) partnership led by National Geographic Explorer-in-Residence Dr. Spencer Wells. Dr. (10) and a team of renowned international scientists and IBM researchers, are (11) cutting-edge genetic and computational technologies to analyze historical patterns in DNA (12) participants around the world to better understand our human genetic roots. (13) three components of the project are: to gather field research data (14) collaboration with indigenous and traditional peoples around the world; to invite (15) general public to join the project by purchasing a Genographic Project Public Participation Kit; (16) to use proceeds from Genographic Public Participation Kit sales to further (17) research and the Genographic Legacy Fund which in (18) supports indigenous conservation and revitalization projects. The Project is anonymous, non-medical, (19) , non-profit and non-commercial and all results will be placed in the (20) domain following scientific peer publication.

线路变压器组接线，应装设的保护是（）。

A.三段过流保护；

B.电流速断和过流保护；

C.带时限速断保护；

D.过流保护。