选择题：Zheng He was a Ming dynasty ________. He succeeded in sailing to the east coast

题目内容：

Zheng He was a Ming dynasty ________. He succeeded in sailing to the east coast of Africa.

A.tourist

B.teacher

C.inventor

D.explorer

参考答案：

There are a lot of ________ on the grassland. And a sheepdog is sitting next t

There are a lot of ________ on the grassland. And a sheepdog is sitting next to them.

分类：中考题型：选择题

分类：中考题型：选择题

果蝇的性染色体有如下异常情况： XXX 与 OY （无 X 染色体）为胚胎期致死型、 XXY 为可育雌蝇、 XO （无 Y染色体）为不育雄蝇。摩尔根的同事完成多次重复实验，发现白眼雌蝇与红眼雄

分类：中考题型：选择题

分类：中考题型：选择题

某水库引入亚洲公鱼和大银鱼两种经济鱼类，亚洲公鱼以浮游动物为食，产卵期的亚洲公鱼会吞食本种、大银鱼的鱼卵和幼鱼；大银鱼幼鱼主要摄食枝角类、轮虫和原生动物等，成鱼主要捕食小型鱼、虾。请回答

分类：中考题型：选择题