题目

回答下列与常见的酸有关的问题．（1）胃液中有助于消化的酸是 ．（2）浓硫酸常用作某些气体的干燥剂，主要是利用了浓硫酸具有 性．（3）分析下列酸与金属氧化物反应方程式，这类反应的规律一般都生成 ． ①CuO+H2SO4═CuSO4+H2O②K2O+2HNO3═2KNO3+H2O③Fe2O3+6HCl═2FeCl2+3H2O． 答案：【1】盐酸【2】吸水【3】盐和水V. [2015 •乌鲁木齐]完形填空A group of frogs were traveling 1 the forest,but unluckily two of them fell into a hole. The other frogs tried to help them. When they saw how 2 the hole was,they cried to the two frogs that they could not be saved. The two frogs didn't care and tried their best to jump up out of the hole. The other frogs 3 saying that they were sure to die.4 ，one of the two frogs heard what the otherfrogs were saying and 5 . Then he fell down anddied.However,the other frog 6 to jump as hard as he could. At last,he made it out. When he 7 ，the other frogs asked，“Didn’t you hear us?” Thefrog,who had a poor 8 ，explained ,“I thoughtyou were encouraging me all the time. ”The story teaches us a 9 ： There is power oflife and death in the tongue. An 10 word tothose who are down can help them out while a discouraging word can kill them.() 1. A. cross   B. through   C. across   D. over() 2. A. deep   B. small   C. big   D. wide() 3. A. kept   B. finished   C. practiced   D. stopped() 4. A. Luckily   B. Finally   C. Suddenly   D. Happily() 5. A. went to   B. kept away   C. jumped out   D. gave up() 6. A. happened   B. continued   C. planned   D. wanted() 7. A. got out   B. ran away   C. got off   D. woke up() 8. A. smelling   B. eyesight   C. hearing   D. looking() 9. A. way   B. skill   C. sentence   D. lesson() 10. A. interesting   B. exciting   C. excellent   D. encouraging