【简答题】控制变量法是科学探究中常用的方法之一。 (1)在探究固体物质的溶解度时,需要考虑的因素有:1溶质的种类;2溶剂的种类;3溶质最多被溶解的质量;4溶剂的质量;5温度。 如测定“某物质在不同温度下的溶解度”,研究的是_____(填序号)受温度的影响,这就需要控制其他因素保持不变。 (2)上表是利用控制变量法测得的氯化钠、硝酸钾在不同温度时的溶解度,请根据表格内容及实验现象回答下列问题。 1从上表可知,...
【单选题】溃疡病急性穿孔非手术治疗期间最重要的措施是
【简答题】Even if I had the money, I would think of all the other things I could spend it on. (P61)
【单选题】I’d like to start my own business that’s ____ I would do if I had the money.
【多选题】以下哪些选项不是告诫我们读书应当专心致志( )
【单选题】If I can't borrow the money, I will have to() to do it without money.
【单选题】Even if I had the money, I___ spend it on my favorite dictionary now
【多选题】以下哪些选项告诫我们读书应当专心致志( )
【单选题】In the Frick Collection you can also explore Frick’s beautiful home and garden which are_____ .
C.
well worth being visited