我国国民经济的基础产业是 A．农业 B．工业 C．交通运输业 D．商业

It’s not easy to be an astronaut’s son. Everybody expects you to be special or perfect. I often wonder how my father ever had a son like me. I mean he’s so special and so good at everything he does. Even in middle school he was class president and captain of the football team.
Well, to be honest, I often dream about being some kind of hero or doing something special-like saving a child from a burning building or discovering a new star. I was daydreaming at school one morning when my teacher said there would be a Father’s Day writing competition for the whole school. "I hope we have a winner right here in my class. "
When I got home, I started to think about what to write. My father is an astronaut. No, I wouldn’t start like that. That was the way others saw him. How did I see my father Hmm.
I saw him sitting with me in the dark when I had a terrible dream. I remembered how he hugged me for hours when my dog Spotty was killed by a car. Yes, these were the things I was going to write. To me, he wasn’t just a world-famous astronaut. He was my dad.
My parents and I went to school Thursday night. There were so many people in the big hall! My dad looked at me, and I shrugged (耸肩).
The third prize was announced and it was not me. I was relieved (释然) and disappointed at the same time. The second prize was announced. It was me.
I went up to the stage and read what I had written, My Father’s Son. When I finished, the people stood up and cheered. I saw my father blowing his nose. Tears were running down my mother’s face. Dad cleared his throat and put his hand on my shoulder. "Son, this is the proudest moment of my life. "
It was the proudest moment of my life, too. Maybe I’ll never be a great hero or win a Nobel Prize, but it was enough just to be my father’s son.

The writer felt it ______ to be the son of a famous person.

A. lucky

B. natural

C. hard

D. pleasant

现代运输方式按运输的协作程度分为：一般运输、联合运输、单式联运。（）

对胰腺分泌HC0^-₃的叙述，错误的是（）

A.由胰腺内小导管上皮细胞分泌

B.胆囊收缩素可引起大量分泌

C.可防止盐酸对十二指肠黏膜的侵蚀

D.可为胰酶提供适宜的作用环境

E.胃酸进入十二指肠有利于HC0^-₃的分泌

哪种材料可更多地引发结构性游戏（）

A.颜料

B.积木

C.沙水

D.模拟实物的玩具材料

以下关于吴某行为的说法，正确的是( )。

A．构成走私普通货物、物品罪

B．构成阻碍国家机关工作人员依法执行职务罪

C．应实行数罪并罚

D．不应实行数罪并罚