(1)鼠妇是一种节肢动物,其主要特征是身体分节,体表有坚硬的
(2)铁盒内放置的鼠妇数量应足够多,以避免
(3)丙同学的实验
(4)鼠妇喜欢生活在潮湿的环境中,则甲同学的实验现象是鼠妇大多集中在
(5)丁同学实验中的变量是
(6)进一步分析:除实验探究因素外,影响鼠妇生活的非生物因素还可能有
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2