1.综合题- (共1题)

(1)图中生产者是______,图中所有动物可统称为______。
(2)该食物网中共有______条食物链,写出其中最长的一条食物链,可表示为:_______。
(3)兔和草的关系是______,兔子和鼠的关系是______。
(4)该生态系统中,数量最多的生物是___,数量最少的生物是___,如果人类大量捕猎狐狸,野兔和老鼠的数量会___。
(5)若果在草上喷施农药DDT,(DDT难以分解,会随食物链不断积累),那么体内积累DDT最多的生物是_______。
2.单选题- (共13题)
A.这些动物一直发生着变异 | B.这些动物的生活环境变化不大 |
C.这些动物用有性生殖来繁殖 | D.这些动物又演化成简单的生物 |
3.选择题- (共7题)
Good morning! I{#blank#}1{#/blank#}(是) Frank. This is a {#blank#}2{#/blank#}(照片) of my room. Look! The wall(墙) is white.{#blank#}3{#/blank#}(什么)is this on the wall? It's a {#blank#}4{#/blank#}(地图) of England. What is that? It is{#blank#}5{#/blank#}(一) bed. I can{#blank#}6{#/blank#}(拼写) it, B-E-D, bed. What is that on the bed? It is my jacket. It is{#blank#}7{#/blank#}(橙色的). What's that in the jacket? It's a pen. It is black. There is a {#blank#}8{#/blank#}(被子) on the bed , too. What {#blank#}9{#/blank#}(颜色) is it? Oh, It's blue.. I like my room. Do you want to{#blank#}10{#/blank#}(知道) more?
两个质量分别为2m和m的小木块a和b(可视为质点)放在水平圆盘上,a与转轴OO′的距离为L,b与转轴的距离为2L,a、b之间用长为L的强度足够大的轻绳相连,木块与圆盘的最大静摩擦力为木块所受重力的k倍,重力加速度大小为g.若圆盘从静止开始绕转轴缓慢地加速转动,开始时轻绳刚好伸直但无张力,用ω表示圆盘转动的角速度,下列说法正确的是( )
I am an apple. You can find me growing(生长) in many places(地方) in the world. I am like my cousins, pears and bananas. I am more round than a pear, and bananas are longer than I. I am delicious(美味的), so people all over the world like to eat me. I cost very little money and I help make people healthy. There is a saying in English : An apple a day keeps the doctor away. Don't you think I'm great?
4.填空题- (共6题)
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【1】题量占比
综合题:(1道)
单选题:(13道)
选择题:(7道)
填空题:(6道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:10
7星难题:0
8星难题:9
9星难题:1