The leaves of plants are green because they contain ___. A. water B. chlorophyll C. sugar D. oxygen 相关知识点: 试题来源: 解析 B。本题考查植物叶子呈绿色的原因。选项 A“water”是水,与叶子绿色无关;选项 C“sugar”是糖,也不是叶子绿色的原因;选项 D“oxygen”是氧气,同样与叶子绿色不相关...
The leaves of most plants are green because they contain ___. A. chlorophyll B. carbon dioxide C. oxygen D. water 相关知识点: 试题来源: 解析 A。解析:大多数植物的叶子是绿色的是因为含有叶绿素。这是植物学的科学知识。在英语语法上考查名词的认知。A选项chlorophyll是叶绿素;B选项carbon dioxide是二...
The leaves of most plants are green because they contain ___. A. chlorophyll B. carotenoids C. anthocyanins D. xanthophylls 相关知识点: 试题来源: 解析 A。大多数植物的叶子是绿色是因为含有叶绿素。chlorophyll(叶绿素)是使叶子呈现绿色的主要物质。carotenoids(类胡萝卜素)呈现黄色、橙色等;anthocyanins...
The leaves of most plants are green because of ___. A. water B. sunlight C. chlorophyll D. oxygen 相关知识点: 试题来源: 解析 C。本题考查植物叶子呈绿色的原因。大多数植物的叶子是绿色的是因为含有叶绿素,C 选项“chlorophyll”(叶绿素)符合。A 选项“water”(水)、B 选项“sunlight”(阳光)、D...
A. red pigment B. blue pigment C. green pigment D. yellow pigment 相关知识点: 试题来源: 解析 C。文章中提到大多数植物的叶子是绿色是因为含有叶绿素,叶绿素是绿色的色素,所以答案是 green pigment。A 选项红色色素、B 选项蓝色色素、D 选项黄色色素都与叶子通常呈现绿色的原因不符。反馈...
The leaves of plants are green because they contain ___. A. chlorophyll B. caroteno
The leaves of plants are green because they contain ___. A. red pigment B. blue pigment C. green pigment D. yellow pigment 相关知识点: 试题来源: 解析 C。植物的叶子是绿色是因为它们含有叶绿素,也就是绿色色素。选项 A 是红色色素;选项 B 是蓝色色素;选项 D 是黄色色素,都不符合叶子是绿色的...
A. red pigment B. blue pigment C. green pigment D. yellow pigment 相关知识点: 试题来源: 解析 C。植物的叶子通常是绿色因为它们含有绿色色素,A 选项 red pigment(红色色素)不对;B 选项 blue pigment(蓝色色素)不对;D 选项 yellow pigment(黄色色素)不对。知识点:叶子颜色的成因。反馈...
The leaves of plants are usually green because they contain ___. A. chlorophyll B. carotene C. xanthophyll D. anthocyanin 相关知识点: 试题来源: 解析 A。解析:植物的叶子通常是绿色因为它们含有叶绿素。B选项胡萝卜素使叶子呈黄色、橙色等;C选项叶黄素也不是使叶子呈绿色的主要物质;D选项花青素使叶子呈...
not green. Plants today are green because 14 use green chlorophyll(叶绿素) to produce energy. _ 15_ these early plants probably used something called retinal(视网膜), which is a dark purple colour.During the time of the Roman Empire, it was very 16 to make purple dye(染料). The dye ...