题干

如图所示的电路中,电源电压U=6V电阻R1=6Ω,电阻R2=4Ω,求:

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同类题2

中苏关系在20世纪中国对外关系中占用极其重要的地位,其影响不仅覆盖一个世纪的中国历史,某种程度上也左右着半个世纪的世界冷战史。阅读下列材料:

材料一:中苏两国全权代表周恩来和维辛斯基互相校阅全权证书认为妥善后,同意下述各条:

第一条:缔约国双方保证共同尽力采取一切必要的措施,以期制止日本或其他直接间接在侵略行为上与日本相勾结的任何国家之重新侵略与破坏和平。

第三条:缔约国双方均不缔结反对对方的任何同盟,并不参加反对对方的任何集团及任何行动或措施。

第五条:缔约国双方……发展和巩固中苏两国之间的经济与文化关系,彼此给予一切可能的经济援助,并进行必要的经济合作。

——《中苏友好同盟互助条约》

材料二:现代修正主义的中心——苏修叛徒集团加速走向彻底破产,自以为不可一世的跳梁小丑赫鲁晓夫,曾几何时,变成了不齿于人类的渣滓。他的继承者勃列日涅夫之流,更是一代不如一代,一年不如一年,陷入了内外交困的重重危机。……所谓“勃列日涅夫主义”,归根结底,不过是垂死的新殖民主义的变种而已。

——《人民日报》《红旗日报》《解放军日报》1970年元旦社论

材料三:中苏两国领导人认为就中苏两国关系问题交换意见是有益的。双方一致认为,中苏两国高级会晤标志着中苏两国国家关系正常化。这符合两国人民的利益和愿望,有助于维护世界的和平与稳定。

——1989年5月《中苏联合公报》

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同类题4

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    A recent study by Citi Retail Services found that a growing number of people are embracing digital wallets or e-wallets, due in large part to their convenience and ease of use.

    E-wallets have been called the future of real-world payment technology.With major players like Alipay,WeChat and Apple Pay becoming popular,it seems to be a safe bet that a change in consumer payment technology is coming soon.

    CNN reporter Paul Ripley experienced a day in Beijing without his wallet."In China's largest cities, you can definitely survive without carrying a pocket full of cash and credit cards-as long as you've got your smartphone."He paid for breakfast by scanning a QR code on the window of a hole-in-the-wall restaurant.All he had to do was to enter a password and the transaction was complete.

    Unlike the situations in the US and other countries,"China doesn't have a really money-making credit card system, so Chinese people just skipped credit cards and went straight to mobile payments."Gu Yu,co-founder of the new payment app Mileslife,told CNN.He also pointed out the advantages of mobile payments."No coins or bills that can be lost or stolen. electronic receipts, the ease of keeping rack of spending-and of course,no wallet taking up space."he said.

    However, if we want to make e-wallets a mainstream trend a lot of things will have to change over the coming years.Perhaps one of the most important things that need to be changed is how people regard e-wallets.Linda Barrabee,research director for NPD Connected Intelligence, said in a statement."In order to promote on-the-go consumer transactions and commerce, wireless carriers, credit card companies, and e-commerce companies need to make sure the process is convenient,simple,and secure for consumers."