百度试题 结果1 题目This change is called a ___. A. physical change B. chemical change C. big change D. small change 相关知识点: 试题来源: 解析 B。解析:文章中提到“This is a chemical change.”所以答案是 B。反馈 收藏
百度试题 结果1 题目A chemical change always involves a change in the ___ of matter. A. state B. properties C. quantity D. location 相关知识点: 试题来源: 解析 B。化学变化总是涉及物质性质的变化。反馈 收藏
百度试题 结果1 题目Thiskindofchangeiscalledachemical(化学的)change. 相关知识点: 试题来源: 解析 答案:chemical.形容词chemical作定语修饰名词change.故填:chemical. 我们把这种变化称为化学变化。反馈 收藏
In a chemical experiment, we observe a change in color. This is called a ___. A. color change B. color shift C. color alteration D. color transformation 相关知识点: 试题来源: 解析 A。化学实验中观察到的颜色变化通常称为“color change”,B 选项“color shift”和 C 选项“color alteration...
A. a chemical change is always faster. B. a physical change does not change the appearance of a substance. C. a chemical change produces new substances. D. a physical change always requires heat. 相关知识点: 试题来源: 解析 C。解析:化学变化和物理变化的区别是化学变化产生新物质。A 不一定...
百度试题 结果1 题目___ is a chemical change. (burn) 相关知识点: 试题来源: 解析 Burning [解析] 考查动名词。句意:燃烧是一种化学变化。is是系动词,该空须填句子主语,用动名词做句子的主语,单词位于句首,首字母大写。故填Burning。反馈 收藏 ...
Whenever a chemical change ___, there is a new substance formed.[ ]A.takes place B.takes a place C.takes the place D.took place相关知识点: 试题来源: 解析 答案:A 提示: 该题考查短语动词和时态.take place表示“发生”是一短语动词,该句用来说明一物理现象,应用一般现在时态,由主句的一般现在...
A. In the case of B. In case C. In case of D. In event of 相关知识点: 试题来源: 解析 A in case of sth.:假使,如果;in case:以防,万一;in event of:如果,以防;三项都不符合题意。in the cause of意为“在,,过程中”。句意:在化学变化中一种新物质生成了。反馈 收藏 ...
___a chemical change a new kind of smaterial is formed.( )A. In the case ofB. In caseC. In case ofD.In event of 相关知识点: 试题来源: 解析 考查介词短语.in the case of:至于…,在……的情况下,就…来说,就……而言;in case 万一,以防;in case of防备; 假如;in event of...
A chemical change is different from a physical change because in a chemical change ___. A. the appearance changes B. the composition changes C. the size changes D. the weight changes 相关知识点: 试题来源: 解析 B。化学变化与物理变化不同在于化学变化中物质的组成发生了变化。反馈 ...