It is similar to the concept of skimming a passage in reading. The key is to ask students one or two questions that focus on the main idea or the tone or mood of the whole passage.----Choose the one that best suits the description above.( )
【简答题】(8分)用18mol/L 浓硫酸配制100ml 3.0mol/L 稀硫酸的实验步骤如下:①计算所用浓硫酸的体积,②量取一定体积的浓硫酸,③溶解,④转移、洗涤,⑤定容、摇匀。回答下列问题: (1)所需浓硫酸的体积是 (保留到小数点后一位),量取浓硫酸所用的量筒的规格是 (从下列中选:A. 10ml B. 25ml C. 50ml D. 100ml) (2)在上述实验步骤中,需要用到玻璃棒的有...