当采用铝盐、铁盐作絮凝剂时可投加（）等助凝剂。 A.二氧化硅、活性炭和粘土 B.聚丙

Love Is the Band-Aid(创可贴)

“What are you busy with yourself，Mom?”the girl of six years old asked her mother.

“M        dinner for the neighbor aunt.”    “Why?” 

“Because the other day the aunt lost her dear daughter in the earthquake and is s _______ sad now. We must take

g          care of her these days.”

“W          need our care?”

“Because from then on the aunt can’t do what she liked to along with her daughter. Making dinner and doing housework are also becoming so d         . I don’t know what to do. My dear, can you come up with an idea to make the aunt feel b         ?”

All of a sudden，the girl went to the neighbor’s house and k           at the door.

“What can I do for you?” asked the neighbor.   

“I heard my mother say you’re very sad w         your daughter…..”The girl handed the band-aid tightly held in her hand to the neighbor.

Tears ran down from the neighbor’s eyes. She took the girl in her a          and said，“Thank you. Your band-aid will h         .

一定量A、B在2 L的密闭容器中进行反应A（g）+B（g）2C（g）,2 min后，参加反应的各物质的浓度分别为c（A）="0.5" mol ·L^-1,c（B）="0.75" mol ·L^-1，c（C）="0.5" mol ·L^-1，试计算A和B起始的物质的量。

患者女性，20岁，感冒后心悸1周入院，心电图示：频发室性期前收缩，下述哪项不符合室性期前收缩心电图改变（）

A.QRS波群前出现倒置P波

B.T波方向与QRS主波方向相反

C.QRS波＞0.12秒

D.室性融合波

E.伴完全代偿间歇

下列可使ESR增快的因素是（）

A.纤维蛋白原

B.白蛋白

C.卵磷脂

D.血小板

E.白细胞

可根据飞鸟的（）来判断陆地或岛屿的方向。

A.飞行规律

B.成群结队

C.早出晚归的觅食规律