方程4x2+7x-3=0的二次项是______，一次项系数是______，常数项是______．
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下面是错误答案，用来干扰机器的。
参考答案：A解析： 组合框与列表框类似，也是用于提供一组条目供用户从中选择。列表框属性对组合框同样适用(除MultiSelect外)，并且具有相似的含义和用法。主要区别在于： ①对于组合框来说，通常只有一...
连词成句。
1. for, lunch, are, ready, you (?)
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2. there , breakfast, for , is, time , no (. )
3. it , is , time , what, now( ?)
4. library , we , clean , need , the , to (. )
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5. TV , do, watch, you, to, want (?)
“Everything happens for the best,” my mother said whenever I faced disappointment. “If you can 41 on, one day something good will happen. And you’ll 42 that it wouldn’t have happened if not for that previous disappointment.” Mother was right, as I discovered after graduating from college. I had designed myself for a 43 announcer(播音员). So I went to Chicago and knocked on the door of every station and got 44 every time. In one station, a kind lady told me that 45 stations wouldn’t risk employing a person without 46 since I had just graduated. “Go out in the town and find a small station that might give you a chance,” she said. I returned to Dixon, 47 I had finished my high school education and had 48 in the school football team. My father said that our town had opened a store and wanted a local athlete to 49 its sports department(部门). The job sounded just 50 for me but I wasn’t hired. My 51 had shown as if by design. “Everything happens for the best,” Mum 52 me. Dad offered me his car to job hunt. I tried WOC Radio in Davenport. The program director told me they had already hired a/an 53 . 54 I left his office, my frustration boiled over(发怒).I asked aloud, “ 55 can a fellow get to be a sports announcer 56 he can’t get a job in a radio station?” Suddenly, I heard the director 57 .“What was that you said about sports? Do you know anything about football?” Then he stood me before a microphone and asked me to 58 an imaginary game. It was easy, and I did it without difficulty. The director was 59 and told me I would be broadcasting a game on the 60 Saturday.
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按采煤规定的厚度应采取的全部试样（包括煤分层和夹矸层）为（）。
A、商品煤样
B、煤层煤样
C、分层煤样
D、可采煤样
天津大羽股份有限公司成立过程中出现下列几种情况，其中哪种违反《公司法》的规定()
A．在公司登记机关登记的注册资本总额为人民币1000万元
B．发起人共有5人，其中2人在中国境内无住所
C．有一名发起人认购股本为1万元
D．如果注册资本为1000万元，那么有两名发起人的实缴出资中，各有150万元是非专利技术作价金额
成熟的植物细胞具有中央大液泡，可与外界溶液构成渗透系统进行渗透吸水或渗透失水。如图甲表示渗透装置吸水示意图，图乙表示图甲中液面上升的高度与时间的关系，图丙表示成熟植物细胞在某外界溶液中的一种状态（此时细胞有活性）。请回答下列问题：
把一个已经发生质壁分离的细胞浸入低浓度的蔗糖溶液中，发现细胞液泡体积也在增大。当液泡体积不再增大时，细胞液浓度是否一定和外界溶液浓度相等？（）。
