植物细胞中最常见的二糖和多糖分别是()①乳糖和葡萄②乳糖和麦芽糖③蔗糖和麦芽糖④糖原

题型:单项选择题

问题:

植物细胞中最常见的二糖和多糖分别是()

①乳糖和葡萄

②乳糖和麦芽糖

③蔗糖和麦芽糖

④糖原和纤维素

⑤植物淀粉和纤维素

A.①④

B.③⑤

C.③④

D.②⑤

考点:高中生物组成细胞的分子组成细胞的分子题库
题型:单项选择题

根据《企业所得税法》的规定,企业所得税的征收办法是()。

A.按月征收

B.按季计征,分月预缴

C.按季征收

D.按年计征,分月或分季预缴

题型:单项选择题

阅读理解。

     "Everything happens for the best," my mother said whenever I faced disappointment. "If you carry on,

one day something good will happen. And you'll realize that it wouldn't have happened if not for that

previous disappointment."

      Mother was right, as I discovered after graduating from college in 1932, I had decided to try for a job in radio, then work my way up to a sports announcer. I hitchhiked to Chicago and knocked on the door of every station-and got turned down every time. In one studio, a kind lady told me that big stations couldn't risk hiring an inexperienced person. "Go out in the sticks and find a small station that'll give you a chance," she said. I thumbed home to Dixon, Illinois.

     While there were no radio-announcing jobs in Dixon, my father said Montgomery Ward had opened a store and wanted a local athlete to manage its sports department. Since Dixon was where I had played high school football, I applied. The job sounded just right for me. But I wasn't hired. My disappointment must have shown. "Everything happens for the best." Mom reminded me. Dad offered me the car to hunt a job. I tried WOC Radio in Davenport, Iowa. The program director, a wonderful Scotsman named Peter MacArthur told me they had already hired an announcer.

      As I left his office, my frustration (挫折) boiled over. I asked aloud, "How can a fellow get to be a sports announcer if he can't get a job in a radio station?" I was waiting for the elevator when I heard MacArthur calling, "What was you said about sports? Do you know anything about football?" Then he stood me before a microphone and asked me to broadcast an imaginary game. The preceding (在前的) autumn, my team had won a game in the last 20 seconds with a 65-yard run. I did a 15-minute build-up to that play, and Peter told me I would be broadcasting Saturday's game! On my way home, as I have many times since, I thought of my mother's words: "If you carry on, one day something good will happen. Something wouldn't have happened if not for that previous disappointment."

      I often wonder what direction my life might have taken if I'd gotten the job at Montgomery Ward.

1. The writer shows his _____ by saying ""… if I'd not gotten the job at Montgomery Ward".

A. regret    

B. happiness    

C. gratefulness    

D. disappointment  

2. The underlined phrase "out in the sticks" probably means _____?    

A. in radio stations     

B. in the country     

C. in big cities         

D. in Dixon, Illinois 

3. Why did the writer mention his mother's words over and again? Because _____.     

A. it was his mother's words that encouraged him     

B. his mother was a person who talked a lot    

C. nothing good has happened to him up to now     

D. he got turned down every time he tried

4. Which of the following statements is true according to the passage?    

A. There was a small radio station in Dixon, Illinois.     

B. Peter MacArthur was a program director in Scotland.    

C. WOC Radio in Davenport broadcast imaginary games.     

D. Montgomery Ward had a store with a sports department.

5. When did the writer decide to take a radio-announcing job?     

A. When he hitchhiked to Chicago.    

B. After he graduated from college.     

C. Before he graduated from college. 

D. As soon as he was turned down.

题型:单项选择题

含铁最少的食物是()

A.蛋黄

B.牛肉

C.猪肝

D.牛奶

E.豆类

题型:单项选择题

地铁车辆库停放时间长,主风缸风压不能使受电弓升起时,要用的设备是()

A、脚踏泵

B、辅助升起压缩机

C、压缩机

D、制动储风缸

题型:单项选择题

我区落叶树种小苗反季节栽培通常在()左右,对根系应()。

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