计算：（﹣2）²×7﹣（﹣3）×6﹣|﹣5|

其中，本月应缴电费=(本月表数-上月表数)×单价，为了运用填充柄进行快速计算，应在E2单元格输入(   )

近代前期，随着民族危机的加深，中国社会各阶层为挽救民族危亡提出了各种救国方案。阅读材料，回答问题：
材料一 严格说来，拳匪运动可（以）说是我国近代史上第三个救国救民的方案，不过这个方案是反对西洋化、近代化的与第一第二两个方案是背道而驰的。拳匪的惨败是极自然的。惨败代价之大足（以）证（明）我民族要图生存绝不可以开倒车。等到自强、变法都失败了，国人然后注意（到）孙中山先生所提出的救国救民的方案。
——蒋廷黻《中国近代史》
材料二 梁启超在《五十年中国进化概论》中说：“近五十年来，中国人渐渐知道自己的不足了。……第一期先从机器上感觉不足……于是福州船政学堂、上海制造总局等渐次设立起来。……第二期是制度上感觉不足……第三期便是从文化根本上感觉不足。”
请回答：
（1）材料一中的“拳匪运动”是指什么运动？这次运动的口号是什么？反映出当时社会矛盾发生怎样的变化？
（2）根据材料二中的“从机器上感觉不足”，清政府提出什么口号？其目的是什么？
（3）意识到“制度上感觉不足”后，中国进行了怎样的探索？
（4）据所学知识，指出材料中孙中山救国救民方案的革命理论。概括说明这一理论的实践有何积极作用。

阅读理解

    I had to knock on the taxi to get his attention. Finally, the driver, a man about 60, looked up from behind the wheel and apologized, “I'm sorry, but I was reading a letter.” He sounded as if he had a cold or a cough.

    Since I was in no hurry, I told him to finish his letter. He shook his head, explaining that he had already read it several times and almost knew it by heart. Curious, I asked whether it was from a child or maybe a grandchild. “This isn't family,” he replied. “though he might just as well have been a regular member of the family. Old Ed and I grew up together.”

    They were always friends. But since he moved away from the neighborhood 30 years ago, it'd generally just been postcards at Christmas time between them. A couple of weeks ago, Ed died. “I should have kept in touch.” He repeated this, more to himself than to me. To comfort him, I said sometimes we just didn't seem to find the time. “But we used to find the time,” he said. “Take a look.” He handed the letter over to me.

    The first sentence “I've been meaning to write for some time, but I've always delayed it.” reminded me of myself. It went on to say that he often thought about the good times they had had together. When I read the part where it said “Your friendship really means a lot to me, more than I can say because I'm not good at saying things like that”, I found myself nodding in agreement.

    We had gone several kilometers and were almost at my hotel, so I read the last paragraph: “So I thought you'd like to know that I was thinking of you.” And it was ended with “Your Old Friend, Tom.”

    “I thought your friend's name was Ed,” I said.

    “I'm Tom,” he explained. “It's a letter I wrote to Ed before I knew he'd died. I never put it in the mailbox. I guess I should have written it sooner.” His face was pale as he wiped his eyes with a handkerchief.

    When I got to my hotel room I didn't unpack right away. I had to write a letter and post it.

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