单选题I don' t think physics (is) hard (to learn). (However), my physics (are) very poor.A. isB. to learnC. HoweverD. are

单选题The two men threw everything out of their balloon because ______.

单选题It is not easy to ______ oneself of his bad habits, just as the proverb says, "Old habits die hard". A. remove B. kill C. dismiss D. rid

单选题My father seldom let me do that, ______.

单选题His sister is______ than he.

单选题“ Where is the girl we talked about yesterday?” “Look! Here ___________.”

单选题Judgment was suspended till the following Monday because of the lack of evidence.

单选题It is hard for us to realize what ______ lives people lived in the Middle Ages.

单选题Our football team (feel) (proud of that) we (have won) every (match this yesr).A. feelB. proud of thatC. have wonD. match this yesr

单选题The character armor consists of defensive character traits, like arrogance or apprehensiveness, that developed in childhood to ______ painful feelings. A. turn aside B. ward off C. bread up D. watch over

单选题Essentially, a theory is an abstract, symbolic representation of ______reality.

单选题Hurry up, children! The school bus ________ for us.

单选题A truly smart city must take________account the real needs of its citizens.

单选题Why does Dr. Sterngold think that the Remco chrome-plating plant was responsible for his asthma?

单选题Two trucks were reported to have______head-on yesterday.

单选题It used to be so straightforward. A team of researchers working together in the laboratory would submit the results of their research to a journal. A journal editor would then remove the authors" names and affiliations from the paper and send it to their peers for review. Depending on the comments received, the editor would accept the paper for publication or decline it. Copyright rested with the journal publisher, and researchers seeking knowledge of the results would have to subscribe to the journal. The Internet-and pressure from funding agencies, who are questioning why commercial publishers are making money from government-funded research by restricting access to it-is making access to scientific results a reality. The Organization for Economic Co-operation and Development(OECD)has just issued a report describing the far-reaching consequences of this. The report, by John Houghton of Victoria University in Australia and Graham Vickery of the OECD, makes heavy reading for publishers who have, so far, made handsome profits. But it goes further than that. It signals a change in what has, until now, been a key element of scientific endeavor. The value of knowledge and the return on the public investment in research depends, in part, upon wide distribution and ready access. It is big business. In America, the core scientific publishing market is estimated at between $7 billion and $11 billion. The International Association of Scientific, Technical and Medical Publishers say that there are more than 2,000 publishers worldwide specializing in these subjects. They publish more than 1.2 million articles each year in some 16,000 journals. This is now changing. According to the OECD report, some 75% of scholarly journals are now online. Entirely new business models are emerging; three main ones were identified by the report"s authors. There is the so-called big deal, where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements. There is open-access publishing, typically supported by asking the author(or his employer)to pay for the paper to be published. Finally, there are open-access archives, where organizations such as universities or international laboratories support institutional repositories. Other models exist that are hybrids of these three, such as delayed open-access, where journals allow only subscribers to read a paper for the first six months, before making it freely available to everyone who wishes to see it. All this could change the traditional form of the peer-review process, at least for the publication of papers.

单选题The FDA has tried repeatedly to control ______.

单选题 It is said that her mother ______ for several years.

单选题Diana made a lot of effort to persuade her parents into ______ to her going to the United States to study business administration in MIT.

单选题________finished his work, he had to stay at home at the weekend.