英语新课标必修四unit2书上练习
题目
英语新课标必修四unit2书上练习
Choose the ncorrect verbs for the blanks below.Use their infinitive or -ing forms.One word is used twice.
die encourage fight find leave work make manage plough spend turn
An old farmer was about______.He wanted_______sure that his sons would stop_____among themselves.Hhoped____them_______the farm successfully .The old man called his sons together and said,''My sons,I'm about______this life .You will find all that I have in the farm ."
Some time later ,after their father had died,the sons started____long hours____in the fields.They thought that their father had bured a treasure in the ground .They kept_____from morn till night,_____the soil over again ,but still failed_________any treasure.That year'scrops,however,were better than any of their father'scrops and sold for a very high price .In the end ,the nyoung men found that _________hard is truly a treasure in itself.
答案
第十八十九张幻灯片
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
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