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【简答题】
已知两直线l 1 ：x+8y+7=0和l 2 ：2x+y-1=0． （1）求l 1 与l 2 交点坐标； （2）求过l 1 与l 2 交点且与直线x+y+1=0的直线方程．
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反馈参考答案：
举一反三
【简答题】第二节 根据中文，完成句子（每空0.5分，共10分） 86.只有持续锻炼一个月后你才能完全康复。 Only after you keep on practising for a month_____ _______completely recover. 87.这幅漂亮的图画吸引了我的注意力。 The beautiful picture _________ ________ _________...
【多选题】下列说法中正确的是( )
A.
配位滴定法是利用配位反应进行滴定分析的方法
B.
能够用于配位滴定分析的配位化学反应较少
C.
EDTA是配位滴定法中最常用的配位体
D.
配位滴定分析属于电化学分析
【单选题】How many jobs were added to the labor market in September in the US?
A.
44, 000.
B.
114, 000.
C.
86, 000.
D.
81, 000.
【单选题】In the market , merchants _____ with customers .
A.
discussed
B.
debated
C.
quarreled
D.
Bargained
【单选题】A 7-year 6% annual coupon payment bond priced at 100 of par value is trading in the market for 103. The modified duration and convexity of the bond is 6.5 and 86 respectively. The approximate return i...
A.
-7.8%
B.
-8.78%
C.
-9.75%
【单选题】关于电流效率,下列说法不正确的是()。
A.
因为总会有副反应发生，所以电流效率总是小于100％
B.
控制电位电解时，选择适当的电位，就可以得到较高的电流效率
C.
控制电流电解时，因为后续的干扰反应总是在一定电解时间后发生，所以选择适当的电解时间，就可以得到较高的电流效率
D.
库仑分析中，若能选择适当的电极反应以产生滴定剂，就可以得到较高的电流效率
【单选题】________ developing the market in your area, we are airmailing you new models of our products.
A.
Due to
B.
Owing to
C.
In order to
D.
With a view to
【单选题】听力原文：M: Welcome to my house! W: Well, Mr. Robinson, I' m greatly surprised with all the work you've done on your house. (19)How long have you been working on it? M: (19)I first became engaged in Do-it...
A.
For several months.
B.
For seven years.
C.
For a year or two.
D.
For several years.
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