对炎症病灶显像最具有特异性的显像剂是（）。 A.67Ga B.99mTc-HMPAO

小儿败血症抗感染治疗疗程应为（）

A.7～10天

B.至少2周

C.3周以上

D.3～5天

E.取决于临床疗效及有无并发症

如图所示，闭合金属线圈abcd从一定高度自由下落进入一有界匀强磁场．bc边刚一进入磁场时，线圈受到的安培力恰好等于其重力．已知磁场宽度和ab边长度相等．能反映bc边开始进入磁场到ad边刚出磁场的过程中，线圈中感应电流随时间变化规律的图象是（以逆时针方向为电流的正方向）（　　）

A．

B．

C．

D．

2011年8月2日发布的国家统计局数据显示，2011年上半年，中国规模以上工业企业中，国有及国有控股企业生产同比增长17.7％，而非国有企业增长18％，私营企业增长20.8%。民间投资占城镇固定资产投资的比重不断提高，今年首次突破50%。材料所述的现象[ ]

①说明公有制的主体地位已被民营经济所取代

②适合社会主义初级阶段生产力发展不平衡、多层次的状况

③说明多种所有制经济可以发挥各自优势，共同发展

④说明私营经济的发展明显快于国有经济，他同较高的生产力水平相适应

A、③④

B、①②

C、②③

D、①④

In June 1985, two British mountaineers Joe Simpson and Simon Yates made the first-ever climb of the 21,000-foot snow-covered Siula Grande mountain in Peru. It was an exceptionally (26) job, but nothing compared to what was to (27) . Early in the process, Simpson (28) and broke his right knee. Yates could have (29) him but managed to find a way of (30) him down the mountains on a rope in a series of difficult drops. Then Simpson fell into a crevasse and Yates eventually had no (31) but to cut the (32) , completely convinced that his friend was now (33)

In his book on the (34) , Joe Simpson wrote:

(35) I looked at the distant moraines, I know that I must at least try I would probably (36) there among those rocks. If I died, well, that wasn’t so (37) , but I wouldn’t have (38) waited for it to happen. The (39) of dying no longer affected me as it had in the crevasse at first. I now had a chance to (40) it and struggle against it.

The survival of Yates himself was (41) . That Simpson somehow found a way of (42) out of the crevasse after 12 hours and then crawled and (43) himself six miles back to camp, (44) three days and might without food or drink, would be considered as a heroic fiction. But in fact it was so (45) .

28().

A. bent

B. fell

C. raised

D. survived

小麦粒是由皮层、糊粉层、胚乳和胚芽4部分组成。( )