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(NHCE) 单词连线 unit 8
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which sentence in paragraph one is the thesis statement?1）October often looks and feels dreary because school is by then in full swing. 2）Today, a rainy Thursday, is no different. 3）What makes it worse is that I am forced to sit in my writing class and write a composition. 4）It is no wonder that a shadow of gloom hangs over the things and the people that surround me in this room.As I look around, I see that the surroundings are old and depressing. There is a broken brown chair beside the teacher's desk; no one will sit in it for fear of leaning back and toppling over onto the floor. There is also a mahogany bookcase with a missing shelf, and all the books are piled on the bottom in a stack of blue and yellowed covers, instead of standing in a straight row. This ugly desk of mine is filled with holes and scratches because other impatient students, no doubt, lost their tempers and took out their anger on the wooden surface. As I rub my hand across it, I feel coldness.Aside from the unattractive surrounding, the people around me show this mood of tension and displeasure. Mary, a slim blonde at my right, chews the inside of her lower lip. I can see by the way her forehead is wrinkled that she is having quite a bit of trouble. Because only one or two words in blue ink stand upon her clean white page, she looks around the room fearfully for some new ideas. David Harris, sitting at my left, nibbles each finger of each hand. The tension gets to him too; drops of perspiration run slowly down his cheeks. All these signs of gloom do not help my mood at all.These painful moments make me wonder if what my friends told me about college was all true, Where arc the freedom and relaxed atmosphere my friends bragged about? I'm supposed to be enjoying myself instead of suffering! Everybody seems to have forgotten that college is hard work too. My first days in writing class prove that delight and pleasure often disappear when assignments are due!
Fill in each of the following blanks with an appropriate word or phrase.Incollegeanduniversitycourse,theobjectivetestandtheessayexamaretwocontrastingmethodsofevaluationcommonlyusedtomeasureastudent’sgraspofsubjectmatter.Theobjectivetest1)_________consistsofalargenumberofunrelatedquestionsthatrequirethestudenttodemonstratemasteryofdetails.It2)_________leadtorotememorizationofisolatedfactsduringthepre-testperiodofstudy.3)_________thequestionsontheobjectivetestarepresentedinatrue-falseormultiple-choiceform,thestudentmaybeencouragedtoguessanswerstowhichhehasnoaccurateknowledgeabout.Theessayexam,4)________usuallyconsistsofafewbroadlystatedquestionsthatrequirethestudenttoorganizehisresponsesinanessay.Suchquestionsforcethestudenttogiveproofofhisabilitytohandlegeneralconcepts.Thistypeofexam5)_________reliesonfactualinformation,6)_________thereisfargreaternecessityforthestudenttodemonstrateanalyticalandcompositionalskills.Mereguessingatanswersisreducedtoaminimum.7)________theobjectivetestandtheessayexamhavesimilargoals—theassessmentofastudent'sacademicachievement—thetechniques(andveryoftentheresults)ofthetwotypesofexaminationsdiffersignificantly.
属于模拟信号的是( )。
根据抽样定理,对低通型模拟信号进行抽样的抽样频率fs与模拟信号的最高频率fm的关系是( )。
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