题目

Good amounts of sleep every night ________ also important for your health. A . is B . are C . was D . were 答案：B将0．4gNaOH和1．06g Na2CO3混合并配成溶液，向溶液中滴加0．1mol·L-1稀盐酸。下列图像能正确表示加入盐酸的体积和生成CO2的物质的量的关系的是 [     ]A．B．C．D．