问题
填空题 案例分析题
下图表示植物不同器官对生长素的反应。请观察后据图回答:
促进芽生长的最适生长素浓度是()c/mol·L-1。
答案
参考答案:
10-8
下图表示植物不同器官对生长素的反应。请观察后据图回答:
促进芽生长的最适生长素浓度是()c/mol·L-1。
参考答案:
10-8
完形填空。 | ||||
Most adults once studied at school, had classes and did their homework every day. The same 1 is going on at school now. 2 it seems that doing weekend homework is another problem for the 3 students. All the students 4 that weekend homework should be abolished (取消). It is 5 for them to study at school five days a week. They have a lot of interests. 6 homework to do on Saturday and Sunday, when can they 7 time to help their parents do the housework, go and see a football or basketball game or a good 8 , join in family recreation (娱乐), or just have a rest at home? Because of these other activities, the homework can't be finished 9 Sunday evening. So their weekend homework is usually done in such a hurry that on Monday teachers are 10 and often threaten (威胁) to 11 the whole class of students because many of the students know 12 about the lessons. 13 there were no weekend homework to do, they would be 14 to go to school on Monday after 15 good rest and to learn what the teachers teach. | ||||
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