营业期间，发现有人神色紧张，答非所问，东张西望，窃窃私语，疯疯颠颠，或带有色眼镜、口

广告法规的特点有哪些？

A公司向B公司签发一张出票日期为10月20日、金额为100万元、出票后1个月付款的银行承兑汇票，甲银行为承兑人。11月1日，B公司将该汇票背书转让给C公司。11月5日，C公司在汇票的背面记载"不得转让"字样后，将该汇票背书转让给D公司。11月10日，D公司在汇票粘单上记载"只有E公司交货后，该汇票才发生背书转让效力"字样后，将该汇票背书转让给E公司。11月15日，E公司将该汇票背书转让给F公司。11月25日，持票人F公司向甲银行提示付款时，甲银行以出票人A公司未能足额交存票款为由拒绝付款。要求：根据上述资料，分析回答下列第1~8小题。

A公司在签发银行承兑汇票时，出票日期10月20日的正确写法是（）。

A.拾月贰拾日

B.零拾月零贰拾日

C.壹拾月贰拾日

D.零壹拾月零贰拾日

I worked for a short time as a cashier(出纳员) at a restaurant a few months ago. I also helped to clean up the tables when it was very busy. One night, just before  Christmas, I found a large black wallet on the floor near one of the tables. I guessed I should check it to find out who was the owner, but I was very busy at the time. And I imagined that if there was something valuable(有价值的) in the wallet, the   owner would be back. Sure enough, an hour later a man came up to the counter   and asked if anyone had found a wallet. I asked him to describe the lost wallet, and after he described it exactly, I gave him the wallet. He expressed his thanks when I handed it to him. He asked me if I had opened it, and when I told him “no”. At  once he opened it and showed that it had nearly $ 800 in cash(现金). He took out a twenty-dollar bill and handed it to me and I was amazed at this. “A reward(酬劳) for your honesty,” he said and then turned and walked away.

Thinking about it later, I began wondering whether I would have been honest if I had known what was in the wallet! I thought that if I had no way to find the   owner and no one returned to get it, I might keep it. But it also came into my    mind that I actually saved someone’s Christmas plans by finding and returning the wallet. The good feeling it gave me was worth more than anything could buy.

小题1:Which of the following is true?

A．The owner of the wallet found a twenty-dollar bill gone.

B．The writer wasn’t surprised when the man gave her a reward.

C．Nothing in the wallet was missing.

D．The man was very, very excited when he got his wallet back.小题2:The writer returned the wallet to the owner because _______.

A．she thought Christmas was coming

B．the owner came back too soon

C．she didn’t know there was so much money in it

D．as an honest person, she didn’t care much about money小题3:Which of the following is NOT true?

A．The writer accepted a reward of $ 20.

B．The writer regretted (后悔) that she had returned the wallet.

C．The writer didn’t return the wallet until the owner came back.

D．The writer fell very happy after she returned the wallet.

如图，物体A和B叠放在水平面上，水平力F作用在B上，如果A和B一起作匀速直线运动，则有(　 　)  

A．A对B物体的摩擦力大小为0

B．B物对A物的摩擦力大小为F，方向向右

C．地面对B物的摩擦力大小为0

D．地面对B物的摩擦力大小为F，方向向右

现场的粉尘主要有哪些危害？