下列细菌感染易出现内毒素血症的是（） A.金黄色葡萄球菌 B.痢疾志贺菌 C.变形杆

受精后第几天植入结束

A．2～3天
B．5～6天
C．8～9天
D．11～12天
E．2周后

患者，男，63岁，突然昏倒，不省人事，牙关紧闭，两手握固，四肢厥冷，呼吸气粗，脉沉弦。依据药性特点，不宜选用（）。

A.麝香

B.冰片

C.石菖蒲

D.苏合香

E.细辛

干酪性肺炎

A．右肺下叶球形、分叶状块影，边缘有毛刺。患者无发热，有刺激性咳嗽
B．右肺下叶球形病灶，周围有卫星灶，可见钙化。患者无发热，有盗汗及乏力
C．左肺门块影，肿块轮廓不规整，左主支气管壁增厚，纵隔淋巴结肿大，患者有声音嘶哑
D．石肺上叶大片状密度均匀一致的阴影，患者有高热、寒战，咳铁锈色痰
E．右肺上叶尖后段片状模糊阴影，密度不均，其内见虫蚀样空洞，患者发热、盗汗，咳黏液黄痰，小量咯血有关肺结核的鉴别诊断

股份协议转让或行政划拨双方取得证券交易所对股份转让的确认文件后，应当向( )提出股份转让过户登记申请。

A．国有资产管理部门

B．证券交易所

C．证券登记结算公司

D．当地政府

In the early 1960s Wilt Chamberlain was one of the only three players in the National Basketball Association (NBA) listed at over seven feet. If he had played last season, however, he would have been one of 42. The bodies playing major professional sports have changed dramatically over the years, and managers have been more than willing to adjust team uniforms to fit the growing numbers of bigger, longer frames.

The trend in sports, though, may be obscuring an unrecognized reality: Americans have generally stopped growing. Though typically about two inches taller now than 140 years ago, today’ s people—especially those born to families who have lived in the U. S. for many generations--apparently reached their limit in the early 1960s. And they aren’t likely to get any taller. "In the general population to- day, at this genetic, environmental level, we’ve pretty much gone as far as we can go," says anthropologist William Cameron Chumlea of Wright State University. In the case of NBA players, their in- crease in height appears to result from the increasingly common practice of recruiting players from all over the world.

Growth, which rarely continues beyond the age of 20, demands calories and nutrients—notably, protein—to feed expanding tissues. At the start of the 20th century, under-nutrition and childhood infections got in the way. But as diet and health improved, children and adolescents have, on average, increased in height by about an inch and a half every 20 years, a pattern known as the secular trend in height. Yet according to the Centers for Disease Control and Prevention, average height—5’9" for men, 5’4" for women—hasn’t really changed since 1960.

Genetically speaking, there are advantages to avoiding substantial height. During childbirth, larger babies have more difficulty passing through the birth canal. Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and can- not easily withstand repeated strain imposed by oversize limbs. "There are some real constraints that are set by the genetic architecture of the individual organism," says anthropologist William Leonard of Northwestern University.

Genetic maximums can change, but don’t expect this to happen soon. Claire C. Gordon, senior anthropologist at the Army Research Center in Natick, Mass. , ensures that 90 percent of the uniforms and workstations fit recruits without alteration. She says that, unlike those for basketball, the length of military uniforms has not changed for some time. And if you need to predict human height in the near future to design a piece of equipment, Gordon says that by and large, "you could use today’s data and feel fairly confident.\

The text intends to tell us that（）

A. the change of human height follows a cyclic pattern

B. human height is becoming even more predictable

C. Americans have reached their genetic growth limit

D. the genetic pattern of Americans has altered