题目

盐酸和醋酸是生产、生活和化学实验中常用的酸。请回答：   （1）人的胃液中含有盐酸，经测定某人胃液的pH＝2，则其中的c(H+)=    mol/L。   （2）食醋常用于食品调味，其主要成分为醋酸。醋酸的电离方程式为：                                                          。   （3）室温下，pH＝3的盐酸和醋酸溶液，下列各项中相等的是     （填序号）。 ① 溶液中c(H+) ② 酸的物质的量浓度 ③ 完全中和时，消耗NaOH的质完形填空 　　One Friday there are not (1) classes in Li Lei s class. They work in a factory. They want (2) the workers make the machines. The factory is very far（远的）. so they go there (3) . There are (4) of foreign students in the class. Some (5) from Australia. And some (6) England. Now they are (7) the bus to the farm. They are singing and (8) on it. They are very happy (9) they think picking apple is fun (10) . And they can fly kites and swim in the small river near there after work. (1) A．any B．some C．many D．/ (2) A．help B．to help C．helping D．helps (3) A．by bus B．by a bus C．on bus D．in bus (4) A．many B．any C．much D．lots (5) A．be B．are C．of D．comes (6) A．is from B．be from C．come from D．comes (7) A．ride B．riding C．on D．by (8) A．talk B．talking C．are talking D．to talk (9) A．so B．because C．but D．and (10) A．work B．to work C．working D．works