ZKX's LAB

一.填空题:(每小题4分) (每小题4分 共20分)

2021-03-25知识0

三、完形填空(20小题;每小题1分,共20分) 41-60 BAADB CABCC BDADB DDACC

化简(每题4分,共20分)小题1:(1) 3 x 2 +2 x -5 x 2 +3 x &。 小题1:⑴-2 x 2+5 x小题2:⑵6 n小题3:⑶-7 x 2+2 xy+6小题4:⑷-b 2小题5:⑸-2 x 2 y+2 xy+3 xy 2,-2⑸-2 x 2 y+2 xy+3 xy 2,5(1)根据合并同类项的法则:把同类项的系数相加,所得结果作为系数,字母和字母的指数不变,可得出结果.(2)先去括号,然后根据合并同类项的法则进行计算.(3)先去括号,然后根据合并同类项的法则进行计算即可.(4)先去括号,然后根据合并同类项的法则进行计算.(5)先去小括号,再去中括号,然后合并同类项,得出最简整式,进而代入x及y的值即可得出答案.解:(1)原式=(3x 2-5x 2)+(2x+3x)=-2x 2+5x;(2)原式=4m 2+4n+2n-4m 2=6n;(3)原式=-6x 2+3xy-x 2-xy+6=-7x 2+2xy+6;(4)原式=-2a 3 b-b 2+2a 3 b-4b 2=-b 2;(5)原式=3x 2 y-(2x 2 y-2xy+3x 2 y)+3xy 2=3x 2 y-2x 2 y+2xy-3x 2 y+3xy 2=-2x 2 y+2xy+3xy 2,当x=3,y=-时,原式=6-2+1=5.

请翻译下列句子。(每小题4分,共20分)小题1:只有到那时他才决定放弃他的计划。(倒装句) &。 小题1:Only then did he decide to give up his plan.小题2:The cyclists who were trapped in the mountain were rescued finally.小题3:He is so stubborn that nobody can persuade him to change his mind.小题4:Although he was buried in his work,his boss thought little of him.小题5:I often have one student make a speech in to get them interested in English.小题1:Only的倒装需要满足两个条件,only放在句首,且强调状语,本题only放在句首,强调的是时间状语then.小题2:固定词组be trapped in…被围困在…中小题3:固定句型:so…that…如此…以至于…小题4:固定词组埋头于…be buried in…;对…评价很低think little of…小题5:动词短语:让某人做某事have sb do sth.本题型考查学生的语法掌握情况和在上下文语境中恰当运用语法的能力。

第二节完形填空(共20小题;每小题1分,满分20分) 41—60 DABAB CCBDA CABDA DDAAD略

一.填空题:(每小题4分) (每小题4分 共20分)

I.完形填空(每小题2分,共20分) 1.c句意为\"那是什么?2.D eraser以元音音素开头,故冠词用aii。3.B根据上句中的eraser可知。4.b a set of\"—套;一副;一组\"为固定短语。5.C根据下句\"If 6 find the keys…\"可知。6.B句意为\"如果了这串钥匙…。7.A\"给…打电话\"用call。8.C\"给…打电话…\"用\"call…at…。9.A由上文可知应是\"我的\"名字,故用my。10.B\"谢谢。应用\"Thank you.\"或\"Thanks.\"表达。

、用心算一算(每小题4分,共20分)(1) (2) (3) &。 (1)(zhidao2)(3)(4)(5)=3999999(1)2a 7-7a 7(2)4x 2 y+5xy-7x-5x 2 y-4xy-xx 2 y+xy-8x(3)(4)(5)3999999

#(每小题4分 共20分)

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