反渗透

男婴，足月，自然分娩，娩出时脐带绕颈1周，Apgar评分1分钟1分，5分钟为5分。体检：反应差，嗜睡，拥抱反射减弱，肌张力减低。诊断为新生儿缺氧缺血性脑病。

哪项治疗措施不适宜（）

A.吸氧

B.纠正酸中毒

C.维持血糖在正常高值

D.保证每日补液量100ml/kg

E.多巴胺维持血压

2009年冬春季，由于降水量持续偏少、气温偏高，北京、天津、河北、山西、山东、河南、安徽、陕西、湖北等10多个省市区出现三十年一遇的罕见干旱，最严重时，粮食作物受旱面积高达1.6亿亩。据此回答1~3题。

1、因2009年冬春季干旱，下列粮食作物受旱面积最大的是 [ ]

A、水稻

B、春小麦

C、冬小麦

D、玉米

2、关于此次大旱成因的说法正确的是[ ]

A、厄尔尼诺现象导致大气环流异常，引发旱灾

B、暖气流势力强盛，长期控制该地区导致旱灾

C、夏季风势力弱，雨带滞留南方造成南涝北旱

D、此次大旱属于全球变暖引起的极端气候事件

3、上述省区中，七月中旬易受干旱影响的是[ ]

A、皖和鄂

B、鲁和冀

C、晋和豫

D、秦和晋

这块麦田今年增产，或者是因为选用了优良品种，或者是由于田间管理搞得好，或者由于化肥用得多，这块麦田今年确实选用了优良品种，所以( )。

A．这块麦田今年增产并不是由于田间管理搞得好

B．这块麦田今年增产并不是由于化肥用得多

C．这块麦田今年增产肯定是化肥用得多，并且田间管理搞得好

D．这块麦田今年增产可能是化肥用得多，或田间管理搞得好

Extinction is a process that can depend on a variety of ecological, geographical, and physiological variables. These variables affect different species of organisms in different ways, and should, therefore, yield a random pattern of extinction. However, the fossil record shows that extinction occurs in a surprisingly definite pattern, with many species vanishing at the same time.
Which of the following, if true, forms the best basis for at lest a partial explanation of the patterned extinction revealed by the fossil record ？（）

A.Major episodes of extinction can result from widespread environmental disturbances that affect numerous different species.

B.Certain extinction episodes selectively affect organisms with particular sets of characteristics unique to their species.

C.Some species become extinct because of accumulated gradual changes in their local environments.

D.In geologically recent times, for which there is no fossil record, human intervention has changed the pattern of extinction.

E.Species that are widely dispersed are the least likely to become extinct.

试述生物的搬运和沉积作用？