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阅读下列材料材料一：大战宣告结束，内战不容再有，如何以建国之功收抗战之果，甚有赖于先生之惠然一行，共定大计…… ——1945年8月20日蒋介石再次邀请毛泽东到重庆谈判的电报材料二：抗战胜利，日寇投降……乃奸匪竟……企图破坏统一以遂其割据之阴谋，若不速于剿除，不仅八年抗战前功尽失，且必贻害无穷。 ……此次剿共为人民幸福之所系，务本以往抗战之精神，遵照中正所订剿共手本，督励所属努力进剿，迅速完成任务……——1945年10月13日蒋介石给何应钦的密电材料三： “事实上，蒋介石甚至连再占领华南都有极大的困难……如果他不同共产党人及俄国人达成协议，他就休想进入东北。由于共产党人占领了铁路中间的地方，蒋介石要想占领东北和中南就不可能…… 假如我们让日本人放下他们的武器，那么将整个中国就会被共产党人拿过去…… 因此我们便命令日本人守着他们的岗位和维护秩序，等到蒋介石的军队一到，日本军队便向他们投降……这种利用日本军队阻止共产党人的办法是国防部和国务院联合决定而经我批准的。” ——美国总统杜鲁门的回忆回答问题：蒋介石对共产党的真实态度是什么在上述材料中有何依据在当时的实际行动中有何表现

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下面的短文有15处空白，请根据短文内容为每处空白白确定1个最佳选项。 It sounds all wrong-drilling holes in a piece of wood to make it more resistant to knock. But it works because the energy from the blow gets distributed throughout the wood rather than focusing on one weak spot. The discovery should lead to more effective and lighter packaging materials. Carpenters have known (51) centuries that some woods are tougher than others. Hickory(山核桃木), for example, was turned into axe handles and cartwheel spokes (车轮辐条) because it can absorb shocks without breaking. White oak (橡木), for example, is much more easily damaged, (52) it is almost as dense. Julian Vincent at Bathe University and his team were convinced the wood’s internal structure could explain the differences. Many trees have tubular(管状的) vessels that run (53) the trunk and carry water to the leaves. In oak they are large, and arranged in narrow bands, but in hickory they are smaller, and more evenly distributed. The researchers (54) this layout might distribute a blow’s energy throughout the wood, soaking up a bigger hit. To test the idea, they drilled holes 0.65 millimeters across into a block of spruce(云杉), a wood with (55) vessels, and found that (56) withstood a harder knock. (57) when there were more than about 30 holes per square centimeter did the wood’s performance drop off. A uniform substance doesn’t cope well with knocks because only a small proportion of the material is actually (58) . All the energy from the blow goes towards breaking the material in one or two places, but often the pieces left (59) are pristine(未经破坏的). "But instead of the energy being concentrated in one place, the holes provide many weak spots that all absorb energy as they break", says Vincent, "You are controlling the places (60) the wood breaks, and it can then absorb more (61) , more safely". The researchers believe the principle could be applied to any material- (62) example, to manufacture lighter and more protective packaging. That could (63) be used in car bumpers (保险杠), crash barriers and armor for military vehicles, says Ulrike Wegst, (64) the Max Plank Institute for Mental Research in Stuttgart. But she emphasizes that you’d (65) to design the substance with the direction of force in mind. "The direction of loading is crucial", she says.

A. also
B. besides
C. else
D. yet

国民参政会，(国立西南联合大学，中国人民政治协商会议)

A. concerned with the problems that we will have to solve in the future B. reading books of science fiction C. political implication (涵义) D. a recurrent theme E. read worldwide Some form of ideal society is______

论述抗日战争三阶段概况，中国战场的作用和贡献，以及抗战胜利的原因和意义。