以下哪项急性心肌梗死的并发症不引起心包摩擦音（） A.早期纤维索性心包炎 B.心

下列各项中，没有错别字的一项是

A．挖墙角发愤忘食过犹不及防患未燃

B．文身 好行小慧蜚声中外鞭辟入里

C．骄横徇徇善诱出奇不意能近取譬

D．度假村举一反三恰如其份棋开得胜

羊水过多可疑神经管缺损应做的检查是（）

A.血胎盘生乳素

B.血hCG值

C.血雌三醇值

D.羊水中L/S比值

E.血甲胎蛋白值

提高居民收入的含金量，还应疏通民间投资渠道，使居民手里的钱成为“下金蛋的母鸡”。“下金蛋的母鸡”的培育方式有

①购买社会保险   ②购买国债       ③购买住房       ④购买股票

A．①②

B．①③

C．②④

D．③④

1990年以后，辽宁城乡居民收入差距出现了一个上升——下降——再上升的过程，其变动轨迹大体可以划分为三个阶段。
第一阶段1990-1994年，城乡居民的收入比率由1.85扩大到2.14，收入绝对差额由714元扩大到1624元。第二阶段1995-1998年，城乡居民收入差距出现短暂回落。城乡居民的收入比率由2.1下降到1.79，收入绝对差额扩大的势头得到遏制，仅由1935元增加到2037元。第三阶段1999-2007年，城乡居民的收入比率由1.96再度扩大到2.58，城乡居民收入绝对差额由2398元扩大到7527元。
城乡居民收入比率变化轨迹与我国城乡改革的进程基本吻合。90年代以后，国家改革的重心逐步转向城镇，随着国有企业经营管理和收入分配体制的改革，城镇居民工资水平得到大幅度增长。1990-1994年，城镇居民可支配收入年均增长速度达到16.5%，快于农民纯收入的增长速度2.6个百分点，致使城乡居民收入比率扩大。在1995-1998年期间，国家连续两次提高农副产品收购价格，农民纯收入高速增长，增长速度达到16%，快于城镇居民收入的增长速度5个百分点，城乡收入差距比率连续4年下降。1999-2003年，由于种养效益低、收入来源单一、负担沉重等原因，农民增收进入最困难时期，其中1999年和2000年，农民收入甚至出现了负增长。2004年以后，得益于国家一系列支持农民增收的重大政策，农民收入增速回升，但仍未改变慢于城镇居民收入增长速度的状况。在1999-2007年期间，农民纯收入的增长速度为7.1%，慢于城镇居民收入的增长速度4.4个百分点。城乡居民收入比率上升至2.58。

下列说法正确的是：
①1990年以后，辽宁城乡居民收入差距逐年加大，到2007年，城乡居民收入绝对差额已经扩大到7527元
②2004年以后，农民收入增速的回升得益于国家一系列支持农民增收的重大政策
③1990-2007年辽宁农村居民人均纯收入增速都低于城镇居民人均可支配收入

A．仅①②
B．仅①③
C．仅②③
D．仅②

In the world of climate change, it is in the Earth’s cold regions where trends can most easily be seen. The cryosphere, where water is found in solid form, is among the most sensitive regions to temperature change.

The sensitivity of ice and snow to temperature changes is an early indicator of even relatively small differences, says University of Colorado at Boulder senior researcher Richard Armp. He has found that today’s receding and thinning sea ice, mountain glacier mass losses, decreasing snow extent, melting permafrost (永久冻土), and rising sea level are all consistent with warming.

Global mean temperatures have risen one degree Fahrenheit over the past 100 years. with more than half of the increase occurring in the last 25 years, observes Armp who is affiliated with the National Snow and Ice Data Center headquartered at CU-Boulder.

"As slight as that may seem, it’s enough to make a difference, " said Armp. "Now, long-term monitoring of a series of cold region, or cryospheric, parameters (参数) shows that for several decades the amounts of snow and ice around the world have been decreasing. "

The extent of Arctic sea ice is shrinking by about 3 percent per decade. but the trends are not uniform. While recent studies have indicated that the ice thickness also had decreased over several decades, new information shows that the ice may have thinned rapidly, Armp said. Examination of springtime ice thickness in the Arctic Ocean indicates that the mean ice thickness decreased 1.5 meters (4.8 feet) between the mid-1980s and early 1990s.

To mark its 25^th anniversary, the National Snow and Ice Data Center has organized a special session at the 2001 Fall Meeting of American Geophysical Union, taking place this week in San Francisco, that illuminates overall changes in the cryosphere.

The session begins Tuesday and extends through Thursday afternoon, with 75 contributions from all areas of cryospheric study. Papers and posters include examinations of lake and river ice, glacier dynamics, and mass ice balance studies in polar and continental glaciers, regional and polar snow cover trends, and variations in Canadian ice cap elevations.

The signs of global warming include all of the following EXCEPT （）。

A. thinning sea ice

B. decreasing snow extent

C. melting permafrost

D. falling sea level