资本家竞相改进生产技术，提高劳动生产率的直接动因是( )。A．降低劳动力价值 B．

外骨骼的作用：①（）内部柔软器官②防止体内水分蒸发。

This place was darker than I expected, and, in spite of the rain, dirtier. Used to the life of rural Puerto Rico(波多黎各), I had to adjust to the similarly arranged, aggressive two-dimensionality of New York. Everywhere I looked, my eyes met gray and brown straight-edged buildings with sharp corners and deep shadows. Every few blocks there was a cement(水泥) playground surrounded by chain-link fence.

A girl came out of the building next door, a jump rope in her hand, and she hopped over. “Are you Hispanic?” she asked. “No, I’m Puerto Rican.” “Same thing. Puerto Rican, Hispanic. That’s what we are here.” She skipped a tight circle, stopped abruptly, and shoved the rope in my direction. “Want a turn?”

“Sure.” I hopped on one leg, then the other. “So, if you’re Puerto Rican, they call you Hispanic?”

“Yeah. Anybody who speaks Spanish.”

I jumped a circle, as she had done, but faster. “You mean, if you speak Spanish, you’re Hispanic?”

“Well, yeah. No . . . I mean your parents have to be Puerto Rican or Cuban or something.”

“Okay, your parents are Cuban, let’s say, and you’re born here, but you don’t speak Spanish. Are you Hispanic?”

“I guess so,” she finally said. “It has to do with being from a Spanish country. I mean, you or your parents, like, even if you don’t speak Spanish, you’re Hispanic, you know?” She looked at me uncertainly. But I didn’t know. I’d always been Puerto Rican, and it hadn’t occurred to me that in New York I’d be someone else.

Later, I asked. “Are we Hispanics, Mami?” “Yes, because we speak Spanish.” “But a girl said you don’t have to speak the language to be Hispanic.” “What girl? Where did you meet a girl?” “Outside. She lives in the next building.” “Who said you could go out to the sidewalk? This isn't Puerto Rico. Something could happen to you.”

I listened to Mami’s lecture with depressed eyes and the necessary respect. But inside, I quaked. Two days in New York, and I’d already become someone else. It wasn’t hard to imagine that greater dangers lay ahead.

小题1:The first paragraph suggests that the author experienced New York as      .

A．mysterious and unknowable

B．regular and depressing

C．orderly and appealing

D．impressive and dangerous小题2:For the author, being considered Hispanic represents      .

A．a restriction to be overcome

B．an opportunity for self-redefinition

C．the loss of her former identity

D．an unavoidable result of movement to a new place小题3:The mother refers to “Puerto Rico” in order to impress upon the author that       .

A．she should not miss her birthplace

B．New Yorkers may not like newcomers

C．different rules apply to life in New York

D．life was more restricted in Puerto Rico小题4:The author’s mood can best be described as      

A．angry and confused

B．fearful and uncertain

C．excited but lonely

D．worried and resistant

以下关于思维贫乏的描述正确的是（）。

A.联想困难，联想活动显著减慢，自觉脑子变笨

B.朕想速度加快，数量增多

C.思维过程中主题转换带有黏滞性

D.联想数量减少，概念和词汇贫乏

E.联想过程破裂，缺乏逻辑性

永存动脉干的二维超声检查有什么特殊所见（）A.两个大动脉显示平行并列B.肺动脉显示明显大于主动脉C.从各个切面图均不能显示独立存在的主肺动脉或其分支，只能从动脉干处显示其存在D.肺动脉与左心室连接E.肺动脉从冠状动脉起源

永存动脉干的二维超声检查有什么特殊所见（）

A.两个大动脉显示平行并列

B.肺动脉显示明显大于主动脉

C.从各个切面图均不能显示独立存在的主肺动脉或其分支，只能从动脉干处显示其存在

D.肺动脉与左心室连接

E.肺动脉从冠状动脉起源

正常开车时蒸馏碱管堵时，（）是碱管堵的处理工作之一。

A、闪蒸停车清洗

B、蒸馏馏分回流

C、直接切出碱管清洗

D、启碱泵备用泵再切出碱管清洗