金属板幕墙安装时，金属板与板之间的间隙一般为（），用（）等弹_爱下问搜题

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问题填空题

金属板幕墙安装时，金属板与板之间的间隙一般为（），用（）等弹性材料封堵。

答案

参考答案：10～20mm；密封胶或橡胶条

完形填空

Bare foot and dirty, the girl just sat and watched the people go by in the park. She never tried to 36 . She never said a word. Many people passed, 37 never did one person stop.
The next day I decided to go back to the 38 , curious if the little girl would still be there. Right in the very 39 as she was yesterday, she sat with the 40 look in her eyes. 41 I began walking towards her, I could see the back of the little girl’s dress indicated a disability. I guessed maybe that was the 42 the people just passed by and made no effort to help. But I wanted to help her, so I 43 to let her know it was OK. I sat down beside her and 44 with a simple “hello”.
The little girl was 45 and replied a “hi” in a low voice. I asked the girl why she was so sad. The little girl looked at me and said, “Because I’m 46. ” I immediately said, “That you are!”and smiled. The little girl acted 47 sadder, and she said, “I know.”
“Little girl,” I said, “you 48 me of a sweet angel.” She looked at me and smiled. Slowly she stood to her 49 , and said, “Really?”
“Yes, dear, you’re 50 a little guardian angel (守护神) sent to watch over (守护) all those people walking by.”
She 51 her head “yes”. Then she spread her wings and said, “I am. I’m your guardian angel.” I was 52 by what I was seeing. She continued to say, “Because you think of someone other than (而不是) yourself, my job here is done.” Immediately, I also 53 to my feet and said, “Wait, so why did 54 stop to help an angel?” She looked at me and smiled, “You’re the only one who could see me, and you 55 an angel in your heart.”

问答题

甲公司与龙某签订一投资合同，约定：双方各出资200万元，设立乙有限责任公司；甲公司以其土地使用权出资，龙某以现金和专利技术出资(双方出资物已经验资)；龙某任董事长兼总经理；公司亏损按出资比例分担。双方拟定的公司章程未对如何承担公司亏损作出规定，其他内容与投资合同内容一致。乙公司经工商登记后，在甲公司用以出资的土地上生产经营。但甲公司未将土地使用权过户到乙公司。
2000年3月，乙公司向丙银行借款200万元，甲公司以自己名义用上述土地使用权作抵押担保。同年4月。甲公司提出退出乙公司，龙某书面表示同意。2003年8月，法院判决乙公司偿还丙银行上述贷款本息共240万元，并判决甲公司承担连带清偿责任。此时，乙公司已资不抵债，净亏损180万元。另查明，龙某在公司成立后将120万元注册资金转出，替朋友偿还债务。
基于上述情况，丙银行在执行过程中要求甲公司和龙某对乙公司债务承担责任。甲公司认为，自己为担保行为时，土地属乙公司所有，故其抵押行为应无效，且甲公司已于贷款后1个月退出了乙公司，因此。其对240万元贷款本息不应承担责任；另外乙公司注册资金中的120万元被龙某占用，龙某应退出120万元的一半给甲公司。龙某则认为，乙公司成立时甲公司投资不到位．故乙公司成立无效，乙公司的亏损应由甲公司按投资合同约定承担一半。
问题：

甲公司的抵押行为是否有效为什么