第一节 短文改错(共10小题;每小题1分,满分10分)
此题要求改正所给短文中的错误。对标题号的每一行做出判断:如无错误,在该行右边的横线上划(√);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。
It would be difficult to imagine modern life with 56________
the telephone. It has become an useful instrument of 57________
communication, save much time and travel by enabling 58________
people to talk to one another over great distances. 59________
Nowadays it is as easy to talk cross a continent, 60________
or even overseas, it is to talk to one's next 61________
neighbor. Therefore, it is in emergencies 62________
which the telephone really proves its usefulness. When 63________
there is a fire , and when someone is suddenly ill , the 64________
first thing one thinks of it is " Where is the nearest telephone?“ 65________
22.(本小题满分12分)
已知点F1(-2,0),F2(2,0),点P满足|PF1|-|PF2|=2,记点P轨迹为E.
(Ⅰ)求轨迹E的方程;
(Ⅱ)直线l :y=kx+b与轨迹E相交于P、Q两点,M(-1,0)恒满足PM⊥QM.
(1)求证:直线l恒过定点N;
(2)求参数b取值范围.
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