开心学英语四下unit9arethesebluesocksyours(2)内容摘要:
T: A.( S1’s name), can you read the question? S1: Whose underwear is this? Ask other Ss to read the other three questions. Have all Ss practice reading aloud to themselves. Circulate around the classroom to check on Ss. Using the book T: Now look at the picture for A. Whose underwear is this? Have one student answer. S2: It’s Tony’s. Continue with the rest. Put Ss in pairs to practice asking and answering. Song activity Getting ready Have Ss look at the pictures around the lyrics. T: ( point to Dad.) Who’s he ?。开心学英语四下unit9arethesebluesocksyours(2)
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T: Repeat after me. Read each sentence from the dialog after each sentence to have Ss repeat. Put Ss into pairs. Encourage Ss to add facial and voice expressions. Vocabulary Getting ready Put up
2、合而得到,且易与空气中的氧气直接反应而生成 只有 C 项符合题意。 答案:于二氧化硫和二氧化氮叙述正确的是()A两种气体都是无色有毒的气体,且都可用水吸收以消除对空气的污染B二氧化硫与过量的二氧化氮混合后通入水中能得到两种常用的强酸C两种气体都具有强氧化性,因此都能够使品红溶液褪色D两种气体溶于水都可以与水反应,且只生成相应的酸解析:二氧化氮跟水反应,生成硝酸和一氧化氮
he questions on the page. T: A. (S1’s name), can you read the question? S1: What does she like doing? Ask another three Ss to read the other three questions. Have all Ss practice reading aloud to
2、述正确的是 ()A常温、常压下,气体体积的大小取决于分子总数B在标准状况下,水、氧气和氮气分子间的平均距离相等C1 体体积为 ,则一定是在标准状况下D在标准状况下, 某气体的质量为 22 g,则该气体的相对分子质量是 44 g1解析:气体体积的大小取决于分子总数和分子间的平均距离,常温、常压下,气体分子间的平均距离一定,故气体体积的大小取决于分子总数,A 项正确;在标准状况下,水呈液态
2、液浓度一定偏低。 ( )(8)100 .5 1 的 液与 300 1 的 液中 的物质的量浓度相等。 () 1下列溶液中,溶质的物质的量浓度为 1 的是()A将 40 g 于 1 L 水所得的溶液B将 80 g 于水并配成 1 L 的溶液C将 0.5 的 液 100 热蒸发掉 50 g 水的溶液D含 K 为 2 液解析:A 项溶液体积不为 1 L,B 项生成 1 2 项溶液体积不是 50 D
to do. Using the book Demonstrate the game with one pair of Ss first. Give the pair paper tokens and die. Have S1 roll the die and move his/her paper token along the board. S2: makes a question about