下面不是藻酸盐印模材料性能的是（） A.一种弹性不可逆水胶体印模材料 B.完成印模后

发行公司债券，自中国证监会核准发行之日起，公司应在______个月内首期发行，剩余数量应当在______个月内发行完毕。超过核准文件限定的时效未发行的，须重新经中国证监会核准后方可发行。( )

A．3 6

B．3 12

C．6 12

D．6 24

天车工在一个工作班结束后，必须将吊钩升至较高位置，小车开到远离电源滑线的端部，大车开到指定的停车位置。

某甲系某山区县农民。一日夜晚，一头牛犊闯入某甲家院内，并径直到院中牲口食槽内吃草。某甲第二天早晨发现后将牛犊喂养起来。过了一个月不见有人来寻，便将牛牵往20公里外的外县某牲口集市出卖，得款700元。当某甲与买主到集市管理部门办理纳税手续时，被失主发现。某甲开始时谎称该牛为自己所有，后经失主提出证据，不得不承认是自己拾的。买主见牛犊并非某甲所有，遂不愿购买，某甲将款退还给买主，但仍不肯将牛犊返还失主。经集市管理部门调解无效，失主向人民法院起诉要求某甲返还牛犊。某甲辩称自己并非偷盗，而且已经喂养一月，即使返还，失主也应赔偿自己的损失。下列选项中正确的是( )。

A．某甲的行为开始时属于拾得遗失物，应按不当得利处理

B．其后某甲拒不返还牛犊，应作为侵权行为处理

C．某甲必须返还牛犊

D．某甲不得要求补偿全部饲养费用和付出的劳务

铁路局管辖区段内发生与铁路货车有关铁路交通事故时，（）应参加事故调查、协助事故救援。

A.车辆处

B.车辆段

C.运用车间

D.列检作业场

There are many kinds of friends. Some are always (1) you, but don’t understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only (2) friends leave footprints.
I shall always recall the autumn and the girl with the (3) . She will always bring back the friendship between us. I know she will always be my best friend.
It was the golden season. I could see the yellow leaves (4) with the cool (5) . In such a season, I liked walking alone on the roads covered with leaves, (6) to the sound of them.
Autumn is a (7) season and life is uninteresting. The free days always get me (8) . But one day, the sound of a violin (9) into my ears like a stream flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was (10) in playing her violin.
I had (11) seen her before. The music was so nice that I listened quietly. Lost in the music, I didn’t know that I had been (12) there for so long but my existence did not seem to disturb her.
Leaves were still falling. Every day she played the violin at the comer of the building (13) I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became (14) . (15) we didn’t know each other, I thought we were already good friends. I believe she also loved me.
Autumn was nearly over. One day, when I was listening carefully, the sound suddenly (16) . To my astonishment, the girl came over to me.
"You must like music from the violin." she said.
"Yes. And you play very well. Why did you stop’." I asked.
Suddenly, a (17) expression appeared on her face and I could feel something unusual.
"I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that (18) me. " she said.
"In fact, it was your playing (19) gave me a meaningful autumn," I answered, " Let’s be friends. "
The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen to her. Only thick leaves were left behind. But I will always remember the fine figure of the girl. She is like a (20) —so short, so bright, like a shooting star giving off so much light that makes the autumn beautiful.

Ⅱ. 完形填空/Close

A．wind

B．snow

C．air

D．rain