第10题: [多项选择]槟榔横切面的显微特征有() A. 种皮外层为数列小形石细胞,内层为数列薄壁细胞,均含棕红色物质 B. 外胚乳为数列大形内含黑棕色物质的厚壁细胞 C. 内胚乳为白色,多角形,壁厚 D. 种皮内层与外胚乳折合伸入内胚乳中,形成错入组织 E. 胚乳中含大量淀粉粒 参考答案:A, B, C, D
第26题:[单选题]( )Visibility at my position is 200 meters A.The ship’s position is 200 meters away from the berth B.The visibility is decreased 200 meters away from the ship5 s position C.The distances between two vessels are 200 meters D.The visibility is down to 200 meters in the fog 参考答案:D