模型的各个部分联结成一个融化的主干部是()。

题型:填空题

问题:

模型的各个部分联结成一个融化的主干部是()。

考点:航空、航天科学技术航模基础知识航模基础知识题库
题型:填空题
马拉着车奔跑,马对车的拉力F和车对马的拉力F′是一对作用力和反作用力,则两力的大小关系是(  )

A.F>F′

B.F<F′

C.F=F′

D.无法确定

题型:填空题

承兑关系

题型:填空题

钢与铁在成分上的主要区别在于含()量的比例不同。

题型:填空题

( )是世界上第一个现代意义上的结算机构。

A.伦敦期货交易所结算公司
B.芝加哥期货交易所结算公司
C.美国期货交易所结算公司
D.东京期货交易所结算公司

题型:填空题

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) .

30().

A. throwing

B. turning

C. lowering

D. setting

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