Beijing time on July 21st news, according to \"Forbes\" report, Europe’s leaning towards electric vehicles means that diesel locomotives will become even more undesirable for consumers with fixed income by 2030, and European automakers must develop An affordable electric car. But they seem to be heading towards a dead end, trying to develop expensive electric cars that reflect all the functions of traditional cars and Tesla is struggling with Tesla in the high-end market, instead of producing electric cars suitable for the mass market. Therefore, unless the affordability of electric vehicles is significantly improved, there will be a large number of consumers who cannot afford such products. However, due to the existence of mass market demand, European automakers also face the risk of market share being squeezed by Chinese electric vehicle products such as Baojun E. In fact, what the mass market needs is not an electric car that is comparable to Tesla in the high-end market, let alone an electric car that can have all the functions of an internal combustion engine car.

On July 15, the US \"National Interest\" bimonthly website published an article by Caleb Larsen \"Why the Japanese Canglong-class stealth submarine is so powerful\", saying that the Japanese Sea from the Canglong-class submarine uses lithium-ion batteries, which can be used in water at most. It has sailed for two consecutive weeks and adopts AIP propulsion technology, which can greatly reduce the noise of underwater navigation and has strong underwater combat capabilities. The article excerpts are as follows: The Japan Maritime Self-Defense Force will have a total of 12 Canglong-class submarines. These diesel-electric powered attack submarines (the first boat) were originally enlisted in the Japan Maritime Self-Defense Force in 2009 and have some interesting features. The first submarine built in Japan to use lithium-ion batteries \"Huanglong\" belongs to the Canglong class. For a long time, the batteries used in diesel-electric submarines are similar to those used to power cars—lead-acid batteries. Compared with earlier lead-acid batteries, lithium-ion batteries are smaller and lighter, but they can produce greater output power. Therefore, lithium ion

\"Scientists have invented a new type of Zn-CO2 water medium battery in recent years. The schematic diagram of the battery is as follows. The electrode is metallic zinc and selective catalytic materials. During discharge, the greenhouse gas CO2 is converted into the hydrogen storage substance formic acid, etc., to solve the environment and energy. The question provides a new way.\"——Excerpt from Question 12 of the Comprehensive Chemistry of the National College Entrance Examination in 2020. A structure called \"bipolar diaphragm\" is used in the picture. What is this? Photo source: 2020 National College Entrance Examination Bipolar Membrane (BPM) is a new type of ion exchange membrane, proposed in the 1950s, the membrane body can be divided into anion-exchange layer (AEL ), the cation-exchange layer (CEL) and the intermediate interface layer, the hydrolysis catalyst is sandwiched between