写论文和做其他工作一样，都要看效果，收集反应是了解效果的重要渠道，所以要把“收集反应”当作论文写作过程之一。（）
参考答案：对
菠菜中含有丰富的铁质，这里的“铁”是指（ ）
A．铁单质
B．铁分子
C．铁原子
D．铁元素
从方框中选择恰当的选项，补全对话。(有两项多余）
A: Mary, it's your bed time. 1
B: Oh, Mum! 2 It's Friday evening and it's still early.
A: Yes. Tomorrow we have to get up early to catch the train to your grandpa's.
B: 4 OK, I'll go to bed right now. 3 Oh, Mum, do I have to brush my
teeth before I go to sleep?
A: 5 And don't forget to close the bedroom window.
B: I won't. Good night, Mum!
A: Good night!
