由于中国人爱面子，怕丢脸，怕遭人议论却又乐于议论别人，由这一套“议论系统”引发出了严

缺词填空。

     Everybody knows vegetables and fruit are g    1    for people．Many people eat some fruit each day．Mr and Mrs

Smith like e   2      fruit very much and every day Mrs Smith goes to buy some fruit in the shop near her home. She can

buy all k   3      of fruits there,such as apples,pears, oranges and bananas．In different time of the year the p     4    of

each kind of fruit is not the same,s    5     high,sometimes low. Mrs Smith usually t  6     to buy cheap fruit．And b     7   

are  Mr Smith's  favourite fruit．  Mrs Smith buys bananas for   him every week．  But she always chooses the cheap

ones."Eating fruit can help to keep f   8   ," said Mr Smith．"It's quite d     9     from snacks．Both of them can give us

energy．But snacks l    10     cakes, chocolates and sweets are not good for our health at all,"  

如果多项式x²-axy+y²-b能用分组分解法分解因式，则符合条件的一组整数值是a=______，b=______．

下列物质中，只含有极性共价键的是

A．NaOH

B．HCl

C．H₂

D．H₂O₂

营养性贫血的病人经治疗后，如果有效，血象中最早（）出现的变化是

A.血红蛋白量上升，在治疗后4～5天增高

B.红细胞数上升，在治疗后3～5天明显增高

C.网织红细胞数上升，治疗后5～7天达高峰

D.红细胞变大，在治疗后2～3天明显变大

E.红细胞中心浅染恢复，出现于治疗后2～3天

由于（）假设的存在，才产生了当期、以前期间和以后期间等差别，才明确了会计核算的基本程序。

A.会计主体假设

B.持续经营假设

C.会计分期假设

D.货币计量假设