帝尧封黄帝后裔篯铿于今徐州市区建（）国，因此徐州已有（）多年文明史。

以下孝敬父母的实际行动中最重要的是[ ]

A．使父母衣食温饱

B．顺从父母的心愿

C．敬重和爱戴父母

D．物质上赡养父母

有关红细胞的生理特性的叙述，错误的是

A．在血浆中具有悬浮稳定性

B．有可塑性，可通过较细的毛细血管

C．有一定的脆性，衰老时脆性减小

D．对O₂和CO₂的通透性较大

E．能运送O₂和CO₂

根据《矿山安全法》，矿山建设工程安全设施的设计未经批准擅自施工的，由管理矿山企业的主管部门责令______。

A．停止施工

B．吊销营业执照

C．关闭

D．吊销其采矿许可证

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) .

41().

A. common

B. evident

C. extraordinary

D. lucky

检查阀门各密封部位，如轴封、法兰垫片等处，应无（）。

（A）灰尘

（B）锈蚀

（C）渗漏

（D）油污