什么是有效孔隙体积、有效孔隙度？其表示单位是什么？

阅读理解。

      Mrs Brown has a small garden behind her house, and in the spring (春天) she plants some vegetables

in it. She looks after them carefully, and when the summer comes, they look very nice. One evening Mrs

Brown looks at her vegetables and says, "I'm going get them in and we can eat them." But just at that time

her son runs into the room and says, "Mother! Our neighbor's ducks are in the garden and they are eating

our vegetables." Mrs Brown runs out. But it is too late. Mrs Brown is very sad, and her neighbor is very

sorry. Then a few days before Christmas, the neighbor brings Mrs Brown a parcel (包裹). In it there is a

beautiful fat duck and a piece of paper with the words, "Enjoy your vegetables."

根据短文内容，判断正确(T)，错误(F)。

( )1. Mrs Brown plants some flowers in her garden.

( )2. Mrs Brown's vegetables grow well in the spring.

( )3. Mrs Brown wants to get some vegetables to eat one evening.

( )4. The flowers are all eaten (被吃) by the ducks of her neighbor before she plans to pick them.

( )5. A few days before Christmas, Mrs Brown gets a present from her neighbor with a duck in it.

2012年4月以来，中日钓鱼岛之争愈演愈烈。下图为我国钓鱼岛等高线分布图(单位：米)。读图，完成小题。

小题1:对于图中P点的降水分析正确的是

①冬季盛行偏北风，P地处于迎风坡，多地形雨　

②夏季气温较高，对流活动旺盛，多对流雨　

③夏秋多气旋活动，多台风雨

A．①

B．②③

C．①③

D．①②③小题2:有关钓鱼岛的叙述，正确的是

A．降水季节变率大

B．山地的坡度南部小于北部

C．陡崖相对高度约为205米

D．修建环岛公路单位距离造价北部比南部高

甲公司加权平均的最低投资利润率为15%，其下设的A投资中心投资额为500万元，剩余收益为50万元，则A中心的投资利润率为（）。

A．30%

B．10%

C．15%

D．25%

女患者，婚后夫妇同居4年，未避孕而未受孕，应属（）

A.断绪

B.断产

C.五不女

D.全不产

E.以上都不是

分行会计结算部填具的“会计业务专用印章请刻单”的保管期限是（）年。

A.10

B.15

C.5

D.3