
Untitled Quiz
Quiz
•
Biology
•
6th Grade
•
Practice Problem
•
Hard
Ping Lu
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树是地球上最复杂、最成功的植物种群之一,19亿年前,地球上最早出现的绿色植物是?
衣藻
松树
橡树
柳树
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树与人类进化发展密切相关,古人猿从下地爬行到直立行走,树与人类进化的关键技术是?
树叶蔽身
钻木取火
架木为巢
木构水井
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树木的生长过程中通过光合作用制造出供人类和动物呼吸的氧气,光合作用是世界上最大的什么工厂?
绿色工厂
水工厂
氧气工厂
火工厂
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树木的年轮在北半球是“北密南疏”,在南半球是“南密北疏”,这是由什么决定的?
海拔高度
温度
日照量
降雨量
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树种6万多种,其中有些树种是以颜色来命名的,下列哪种树木是以颜色来命名的?
巴沙木
箭毒木
铁梨木
橡树
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树对人和自然的贡献主要体现在哪些功能?
调节气候、蓄水供给、防风固沙、减少噪音
提供食物、建筑材料、燃料、药材
制造氧气、净化空气、吸收二氧化碳
储存能量、提供栖息地、促进生态平衡
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
树的结构中,横切面、径切面和旋切面是进行材种鉴定的依据,这三个切面的构造特征是?
密度、硬度、颜色
纹理、纹路、纹理
纹理、孔隙、纹路
纹理、孔隙、硬度
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