今有鸡兔若干，它们共有24个头和74只脚，则鸡兔各有（  ）

“北极收割机”温室是一个漂浮的半圆建筑，本质是可循环利用的无土栽培农业基础设施，通过利用营养丰富的冰山淡水资源进行大规模水培农业生产，为当地居民供给新鲜水果和蔬菜，帮助原本贫落的冰川国家改善生活。读图，完成下面小题。

    This is my classmate. She's a girl. Her name is Jane. She's twelve years old. She's thin and tall. She has long and black hair. She has two big eyes and a small nose. She has a skirt. It's red. She has a pair of trousers, too. They are red. But her skirt is old. She wants to buy a new skirt. Look, what can she do? Oh, she can skip a rope. This is her rope. It's long. It's blue.

唐长安城中设有东、西两市，市下设行，如肉行、绢行、药行、鼓行、铁行等。可见唐都长安（   ）

下表为探究赤霉素打破休眠对马铃薯苗期生长影响的实验结果，据表分析下列说法不正确的是（   ）