6.函数的值域为:
A. B. C. D.
5.设是方程的两个实数根,则的最小值是:
A.-2 B.0 C.1 D.2
4.函数的最大值是
A.1 B.3 C. D.
3.从点向圆作切线,切线长最小值为:
A.4 B.2 C.5 D.5.5
2.函数在闭区间上有最大值3,最小值2,则m的取值范围是:
A. B. C. D.
1.已知的最小值为:
A.6 B.7 C.8 D.9
74.他的行动使我们确信他是诚实的。His action ____ ____ ____ ____ ___.
75她对穿着特别挑剔。She ___ ____ ____ _____ what she wears.
III短文改错 (每小题1分,共10分,注意格式 )
此题要求改正所给短文中的错误。对标有题号的每一行做出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:
此行多一个词:把多余的词用斜线( \ )划掉,在该行右边横线上写出该词,并也用斜线划掉。此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。注意:原行没有错的不要改。
At the age of fourteen Bell sent to London to 1._________ live for a year with his grandfather, that took good care 2._________ of him. A year late young Bell returned to Scotland. 3._________ After working for time with his father, he began teaching 4._________ speech at a school. His free time was devoted to study 5._________ sound.Before he studied the human voice and the 6._________ vibrations(振动)that goes to make up sound, he found that the 7._________ voice is not a simple thing. So he continued on with his 8._________ studies and his teaching until at the age of twenty-third 9._________ he moved with his family to Canada. 10._________
73.他困惑地看着我,没有回答问题。He looked at me ____ ____ and did not answer the question.
72.他的一番鼓励激起了我的信心。His encouraging remarks ___ ___ ___ ___.
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