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　　1.單選題

　　【填句補文】Gang Xiao and Ben Schrag at Brown University, visualize the current by measuring subtle(細微的) changes in the magnetic field of an object and ________.

　　A、to shrink it to the size of a desktop computer

　　B、to make it capable of measuring very weak changes in magnetic fields

　　C、as well as revealing microscopic defects in anything from aircraft to banknotes

　　D、converting the information into a color picture showing the density of current at each point

　　正確答案：D

　　答案解析：空格前的by在句中引導兩個在句法結構上并列的分詞短語：一個是measuring subtle (細微的) changes in the magnetic field of an object;另一個就是converting the information into…，即：通過測量一個物體的磁場內(nèi)的細微變化和把信息轉化成顯示每一點電流強度的彩色圖片而使電流顯現(xiàn)。

　　2.單選題

　　[閱讀理解]We find that bright children are rarely held back by mixed-ability teaching. On the contrary， both their knowledge and experience are enriched. We feel that there are many disadvantages in streaming pupils. It does not take into account the fact that children develop at different rates. It can have a bad effect on both the bright and the not-so-bright child. After all， it can be quite discouraging to be at the bottom of the top grade!

　　The author‘s attitude towards “mixed-ability teaching” is ______.

　　A、critical

　　B、questioning

　　C、approving

　　D、objective

　　正確答案：C

　　答案解析：選項A表示作者持“批評的”態(tài)度，選項B表示作者持“懷疑的”態(tài)度，選項C表示作者持“贊同的”態(tài)度，選項D表示作者持“客觀的”態(tài)度。根據(jù)本段內(nèi)容可以看出作者是持“贊同的”態(tài)度，所用的人稱代詞也是we，因此答案是選項C。如果是持“客觀的”態(tài)度的話，則人稱代詞不會用we。

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