一元二次方程x2+x-2=0 的两根之积是（ ）

【名词&注释】

江阴市、一元二次方程(quadric equation in one unknown)、亚热带季风气候(subtropical monsoon climate)

[单选题]一元二次方程x2+x-2=0 的两根之积是（ ）

A. -1
B. -2
C. 1
D. 2

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学习资料：

[单选题]空气的成分中，氧气约占空气总体积的

A. 78%
B. 75%
C. 25%
D. 21%

[单选题]28． Which is NOT true?

A. Now in Germany，the teleshopping is more developed than that last year．
B. The French spend a lot of money to buy things by teleshopping，
C. Some big companies in Sweden are selling things by teleshopping
D. Americans are the first to buy things through teleshopping．

[单选题]江阴市的气候类型属：

A. 热带季风气候
B. 温带季风气候
C. 亚热带季风气候
D. 热带雨林气候

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