信贷资产风险分类管理的要求不包括（） A.落实责任 B.动态调整 C.定期分析 D.

不属于遗传性红细胞内在缺陷的疾病是

A．β-珠蛋白生成障碍性贫血

B．PNH

C．G-6-PD缺陷症

D．HbH病

E．遗传性椭圆形细胞增多症

你了解水陆两用坦克吗？

水陆两用坦克的车体比普通坦克要大，呈船形，所以能在水中浮动．有的利用特制的履带划水前进；有的用螺旋桨推进；有的用推进器喷水前进，两用坦克在水上航速不超过15km/h，车辆的全部重力主要是依靠浮力来支持．当水上航速超过15km/h时，浮力会有所减小．

如图所示，水陆两用坦克总质量22t，水上最大速度14km/h，最大航程超过90km.陆地最大速度55km/h，最大行程超过385km，履带总着地的面积约4m²，可越过2.9m的壕沟，这种坦克配备的是450kW的柴油机．

请你根据短文中的信息，结合所学的知识回答下列问题：(g= 10N/kg)

⑴如图所示的水陆两用坦克，在水上航行时，所受的浮力约为  ___ N，排开水的体积约为________m³．

⑵如图所示的水陆两用坦克，在陆地行驶时，对地面的压强约为   ___ Pa．以最大速度行驶385km的时间为      h．

⑶水陆两用坦克在水中前进的三种方式中，涉及到“物体间力的作用是相互的”这一重要知识的是(      )（２分）

A．只有履带的划水前进

B．只有螺旋桨推进

C．只有推进器喷水前进

D．三种方式都涉及

在近代教育史上，对于掌握知识和发展认识能力的问题，＿＿和＿＿＿曾有过长期争论。主张教学的主要任务在于训练学生的思维形式，知识的传授则是无关紧要的学派是＿＿＿＿。主张教学的主要任务是在于传授对实际生活有用的知识，至于学生的认识能力则无须特别训练的学派是＿＿。

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) .

39().

A. horror

B. dream

C. picture

D. imagination

蜗杆传动为什么比齿轮传动平稳？