Some substances are soluble in water. Which of the following is highly soluble in water? A. Oil B. Sugar C. Carbon D. Sand 相关知识点: 试题来源: 解析 B。糖易溶于水。油、碳和沙子都不溶于水。本题考查物质的溶解性,阅读中要注意“soluble in”这个短语。
[Also in Division C1] N,N,N1,N1 - Tetramethyl - 2 - hydroxy - 1,3- propanediamine is prepared by heating dimethylamine and epichlorohydrin; adding sodium hydroxide to the reaction product; vacuum distilling to remove water and dimethylamine; extracting with alcohol to obtain the ditertiary ...
aHowever, substances which are absent in the epididymal luminal fluid are found in epididymal blood, a discrepancy similar to that which exists between similar compartments . 然而,是缺席在epididymal luminal流体的物质在epididymal血液,差误被找到相似于存在相似的隔间之间的那。 [translate] ...
百度试题 结果1 题目14 Which substances are produced by the action of amylase on starch? A amino acids B fatty acids and glycerol D C salts D simple sugars 相关知识点: 试题来源: 解析 D 反馈 收藏
A. Oxygen in the air B. Water in the food C. Lipids in the food D. Proteins in the food 相关知识点: 试题来源: 解析 A。解析:在食物腐败过程中,空气中的氧气常常作为氧化剂参与反应。氧化还原反应的本质是电子的转移,氧气容易得到电子,使食物中的一些成分被氧化,而水、食物中的脂质和蛋白质不是这...
结果1 题目 Non-gaseous substances which ___ naturally as pure elements, such as gold, are rare and are often highly valued.(1分) A. happen B. occur C. perceive D. assume 相关知识点: 试题来源: 解析 B.occur 反馈 收藏
aHowever, substances which are absent in the epididymal luminal fluid are found in epididymal blood, a discrepancy similar to that which exists between similar compartments in the testis (Howards et al., 1976; Hinton and Howards, 1981). 然而,是缺席在epididymal luminal流体的物质在epididymal血液,差...
Non-gaseous substances which___naturally as pure elements, such as gold, are rare and are often highly valued. A. happen B. occur C. perceive D. assume 相关知识点: 试题来源: 解析 B 本题考查句意 句意为“非气态物质,那些自然……就像纯元素,像金,非常稀有并且经常是高价值的” 这里应该...
1541) are worth recalling: "All substances are poisons; there is none which is not a poison. The right dose differentiates a poison from a remedy."... JG O'Brien,JE Kursch - 《Postgraduate Medicine》 被引量: 4发表: 1987年 The King of Poisons: A History of Arsenic It may seem odd...
答案 A[解析] attributes属性,特性;tendencies倾向;elements元素;ingredients成分。因此A最符合题意。相关推荐 1Substances, whether in the solid, liquid, or gaseous state, possess ___ which are independent of the force of cohesion. A.attributesB.tendenciesC.elementsD.ingredients 反馈 收藏 ...