在生长着许多水生植物的池塘中养鱼,经常可以看到鱼在黎明时浮头

在生长着许多水生植物的池塘中养鱼,经常可以看到鱼在黎明时浮头,甚至跳起.有下面几种猜测,你认为哪种更合理?(  )

 

A

鱼喜欢阳光刺激

B

鱼要在水面觅食

 

C

池水中含氧量较低

D

池塘表面水较温暖

答案

C 

相关题目

组成蛋白质的氨基酸之间的肽键结构式是()      A.NH﹣
组成蛋白质的氨基酸之间的肽键结构式是()      A.NH﹣CO         B. ﹣NH﹣CO﹣         C.   ﹣NH2﹣COOH﹣  D. NH2﹣COOH
On the way home I met my friend John, from _______ home the thief had stolen a c
On the way home I met my friend John, from _______ home the thief had stolen a computer.A. whom           B. which               C. that              D. whose
____ he grew older, he lost interest in everything except gardening.   A. When
____ he grew older, he lost interest in everything except gardening.   A. When      B. As     C. While     D. Until  
 The Turners consider ____ a computer, which is commonly considered ____ a grea
 The Turners consider ____ a computer, which is commonly considered ____ a great help in our work and study. A. to buy; to be  B. buying; to be      C. to guy; being    D. buying; being
_______ exciting news! We've never had_______ long vacation before.     A. W
_______ exciting news! We've never had_______ long vacation before.     A. What; such a         B. What an; such a C. How; such a    D. What; so a
在日常生活中出现了“加碘食盐”、“增铁酱油”、 “富硒
在日常生活中出现了“加碘食盐”、“增铁酱油”、 “富硒茶叶”、“含氟牙膏”等名词,这里的碘、铁、硒、氟,应理解为 A.元素           
下列金属中,常温下就易和氧气反应的是( ) A.钯       
下列金属中,常温下就易和氧气反应的是( ) A.钯               B.铂           C.铁               D.铜
下列生物的性状中,不是相对性状的是(    )   A、豌豆
下列生物的性状中,不是相对性状的是(    )   A、豌豆的圆粒和皱粒        B、番茄的红果和黄果   C、兔的长毛和白毛          D、鸡的

最新题目