液化气充装严禁在什么情况下进行作业？

阅读理解。

     Peter wondered why he didn't have many friends. The reason was he was always taking, never giving.

     One day Peter told Bill, "I'd like to give a party on Saturday, I'd like you to come and bring Martha, too."

"Thanks, Peter. We'd be happy to come" "Perhaps you'd like to bring your violin. You and Martha sing well

together. I'm sure everyone will want you to sing for us."That was how Peter began to plan his party. Next

he asked another friend, Betty, to bring a cake."You make the best cake in the world, Betty, and I like to eat

your cake better than have one from the bakery."Peter invited a few other friends to come to his party. He

didn't forget to ask something from each one of them. He even asked Jim and Mary Jackson to let him give

the party at their house! 

     The party was a big success. However, as the guests were leaving, they said "Thank you" to Bill and

Martha for the music, Betty for tile cake, the Jacksons for the use of the house and to others for their hard

work. To Peter they just said, "Thanks for the invitation."

1. The party was held ________.

A. at Peter's house

B. in a large hall

C. at Peter's friend's house

D. in a secret place

2. Which of the following is not true?

A. Betty made the best cake.

B. Mary Jackson sang well.

C. Bill played the violin well.

D. The Jacksons did hard work for the party.

3. ________ liked Peter.

A. Many of his friends

B. Few people

C. Everyone

D. All his friends

4. Peter ________ to give the party.

A. tried his best

B. did nothing

C. only invited some friends

D. did everything

5. From the story, we can see Peter was ________.

A. a warm-hearted man

B. good at making friends

C. a selfish man

D. a welcomed friend

关于纵隔肿瘤症状，下述哪项是错误的（）

A.其症状的程度及发生时间与肿瘤的部位，生长速度相关

B.大部分患者在体检时偶然发现

C.每一类肿瘤都有相应的症状

D.一部分患者有胸闷，胸痛症状

E.一部分患者有压迫相应器官的症状

典型的计算机结构包括______ ，通过系统总线连接在一起。

按特殊条件办理的货物具体分为哪几类？

军用人员列车自动制动机主管压力为（）。

A.400kPa

B.450kPa

C.500kPa

D.600kPa