题型:完形填空 完形填空。 Every country has its favorite food. Italians enjoy __ l __ pizza. Indians like to eat hot food. Japanese like to eat fish. They often don't cook it. In England, one of the most popular kinds of food __ 2__ fish and chips. People usually eat it in a fish and chip shop. They put it in paper bags, and take it home, __ 3 to their workplace. 4 they eat it in the park or on the road. 5 the world's favorite food isn't English, Italian, Indian or Japanese food. It _ 6 that American fast food is the most popular in the world. In New York, Moscow. London, and 7 in some big cities in China, you can find people 8 chips and hamburgers. Chinese food is 9 very popular in the world. In many cities you can find Chinese restaurants. People enjoy Chinese food because it has different 10 and it's usually very delicious.( )1. A. to eat ( )2. A. are ( )3. A. and ( )4. A. Sometimes ( )5. A. And ( )6. A. is ( )7. A. also ( )8. A. drinking ( )9. A. too ( )10. A. tastes B. having B. was B. for B. Sometime B. But B. said B. that B. eating B. either B. kind C. eat C. is C. as C. Usually C. Why C. seems C. too C. are eating C . very C. colors D. to have D. were D. or D. Always D. Or D. likes D. even D. buys D. also D. places 查看答案
题型:不定项选择 下列关于物体的平衡状态的说法中,正确的是[ ]A.物体在静止不动时处于平衡状态B.物体在运动时一定不处于平衡状态 C.运动的物体也可能处于平衡状态 D.物体保持静止或匀速直线运动的状态都叫做平衡状态 查看答案
题型:问答题 在光滑水平面上有一弹簧振子.弹簧的劲度系数为K.振子质量为M,振动的最大速度为v0,如图所示.当振子在最大位移处时.把质量为m的物体轻放其水平表面上,振子的最大位移大小为A,则:(1)要保持物体和振子一起振动,二者间摩擦力的最大值为多少?(2)物体和振子一起振动时,二者过平衡位置的速度多大?振幅又是多大? 查看答案
题型:填空题 A、B两种物质的溶解度曲线如图:(1)在t2℃时,物质的溶解度A______B(填“大于”“小于”或“等于”).(2)当A溶液中含有少量B时,可用______法提纯A.(填“蒸发溶剂”或“冷却热的饱和溶液”).(3)t2℃时,一定量的A物质的饱和溶液蒸发掉10g水,可得到m克A晶体(不含结晶水),该温度时A的溶解度为______g/100g水. 查看答案