Science textbooks and technical and professional journals are usually made up of several parts and contain various special featu

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问题     Science textbooks and technical and professional journals are usually made up of several parts and contain various special features, many of which have a standard format.【B1】usually contain a large number of these parts; journals and【B2】contain many, but not all of them.
    Knowing where to look for information and【B3】to expect in a book can greatly increase your ability to use all the information there. Explanations of and practice using some of these textbook parts and【B4】are covered in these even numbered lessons. The features in textbooks are【B5】into the following three categories. Front matter is the【B6】-numeral paginated section at the front of most books. The text is the main body of the book. The【B7】matter comprises the additional sections at the back of most books.【B8】our discussion of these three sections will deal mainly with textbooks, the practice provided will greatly【B9】your comprehension of scientific【B10】as well.

选项 A、Textbooks
B、Journals
C、Manuals
D、Booklet

答案A

解析 第一句总述科技课本与专业杂志的共同点,即两者均由"若干部分构成,并具有若干特点"。第二句分述两者的差别,即"科技课本通常全面地包括这些部分和特点,而(专业)杂志和手册虽包含这些部分和特点的许多,但不够全面",故分述的主体分别为"(科技)课本"与"(专业)杂志",故答案为A。
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