A.降温使水结冰体积膨胀 温度低,分子静止不动、体积变大 |
B.NaOH和Ca(OH)2溶液都呈碱性 溶液中都含有金属离子 |
C.硝酸钾在热水中比在冷水中溶解的快 温度越高,硝酸钾的溶解度越大 |
D.中和反应都有水生成 氢离子和氢氧根离子结合成水分子 |
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