(Full score 190, 60 points for additional questions) 1. Knowledge Twist (this is composed of a multiple-choice question and a broken vegetable, ***30 melons, 65438+ 0 points per pot) (1) multiple-choice questions (multiple-choice questions). Please fill in the letter of choice in the brackets before the question. Each question, points, *** 15 questions). {) At 20 1 1 March11day 165438: 46, an earthquake measuring 9.0 on the Richter scale occurred in the waters near the northeast of Japan with a focal depth of 24.2 kilometers. Belongs to A shallow earthquakes B Zhongyuan earthquake C deep earthquake 2. () The following description of magnetic levitation is wrong: A The biggest feature of magnetic levitation is that the car body does not contact with the track, and the levitation height is more than 8 mm. B. The magnetic levitation train in China and Shanghai is the first in the world. C. Magnetic levitation mainly relies on magnetic levitation force to push the train forward. Its driving, guiding and control systems are exactly the same as those of wheel-rail trains. 3. () The colors on the color TV screen are composed of three kinds of lights, namely: A. Red, yellow and blue. Red, yellow and blue. 4.() 1 956, a world-famous "water accident" happened in Japan. The culprit is the catalyst used in the production of vinyl chloride and vinyl acetate. This catalyst accumulates in fish and shrimp through the food chain. People and animals will get water sickness if they eat these fish and shrimp. Then the catalyst is: a. formaldehyde day, methylmercury C. methyl ether 5 In order to save water, I only give you a bucket of water to wash the sheets. Which of the following methods is cleanest? A. Wash the whole bucket of water 1 time, and wash the whole bucket of water in two equal parts twice. C. divide the whole bucket of water into three parts.