题目

阅读对话，判断下列句子正误。 Mark: Hi, Alice! Would you like to have a picnic?Alice: Sure. Are you free (空闲) on Monday?Mark: No, I'm busy. I go to the library on Monday. What about Tuesday?Alice: No. I play the piano on Tuesday. I'm free on Monday, Thursday and Friday.Mark: I'm free on Friday.Alice: OK! Let's have a picnic on Friday.【1】Mark is free on Monday. （_____）【2】Mark goes to the library on Wednesday. （_____）【3】Alice plays the piano on Tuesday. （_____）【4】Alice is free on Thursday. （_____）【5】They will have a picnic on Saturday. （____下面是对某种灾害的成因及其影响的具体分析，试回答以下问题。（7分） （1）根据以上分析，判断这种自然灾害最可能是_______________。 (2分) （2）从其成因分析看，这种自然灾害是自然因素和人为因素综合作用于脆弱的生态环境的结果，在此过程中，___________起决定性作用，是主导因素；____________是灾害发生的必要因素。(4分) （3）结合实际判断，我国____________地区是此种灾害发生最严重的地区。(1分)