按工艺要求调节阀可分为风开阀和风关阀，风开阀是指阀头上的风压增大时，调节阀（），风关

5岁男性患者，外伤后致使左肩关节疼痛伴关节活动障碍1小时，X线检查如图所示，最可能的诊断是：()

A．左肱骨上段骨折

B．肱骨骨纤伴病理性骨折

C．肱骨上段骨囊肿伴病理性骨折

D．左肱骨上段嗜酸性肉芽肿伴病理性骨折

E．以上都不正确

阅读理解

                                                             Warren Buffett

     For someone who is such a successful investor,  Warren Buffett comes off as a pretty ordinary guy.

He was born on August 30, 1930. __1__ He used to go doortodoor and sell soda water. When his

family moved to Washington, Buffett became a paperboy for The Washington Post. Buffett ran his five

paper routes and even added magazines to round out his product offerings. While still in school, he was

making$ 175 a month, a fulltime wage for many men.

     __2__ He spent $ 1,200 on 40 acres of farmland in Nebraska. He and a friend also made $ 50 a

week by placing pinball machines in barber shops. They called their venture(企业) Wilson Coin

Operated Machine Co.

     Already a successful smalltime businessman, Buffett wasn't interested in going to college  but ended

up at the University of Pennsylvania-his father encouraged him to go. __3__ But he was turned down,

which had to be one of the worst admission decisions in Harvard history.  The  outcome affected Buffett's

life, for he ended up attending Columbia Business School, where he studied under Professor Benjamin

Graham  the father of securities analysis who provided the foundation (基础) for Buffett's investment

strategy.

     From the beginning,  Buffett made his fortune from investing. He started with all the money he had

made from selling soda water,  delivering papers,  and operating pinball machines. Between 1950 and

1956, he grew his $ 9,800 to $ 14,000. __4__  And then he gradually drew in other investors through

word of mouth and very attractive terms.

     __5__ He doesn't collect houses or cars or works of art, and he disdains(鄙视) companies that

waste money on expensive cars, private dining rooms, and highpriced real villas. He is a creature of

habit-same house, same office, same city, same soda water.

A. Then Buffett applied to Harvard Business School.

B. Buffett is more likely to be found in a fourstar restaurant.

C. When he was  14, Buffett developed great interest in investment.

D. Even as a young child, Buffett was serious about making money.

E. One thing is for sure about Buffett: he is happy to do what he is doing.

F. Buffett's investment strategy  mirrors his lifestyle and his overall philosophy.

G. From there, he organized investment partnerships with his family and friends.

工厂高压配电网有哪些接线方式和特点？5%

已知决定色氨酸的密码子只有一种，决定亮氨酸的密码子有六种。下列相关叙述中，正确的是（）

A.亮氨酸被利用的机会多于色氨酸

B.决定亮氨酸的基因中相关碱基序列替换一个碱基对时，编码的氨基酸不可能仍是亮氨酸

C.决定色氨酸的基因中相关碱基序列替换一个碱基对时，编码的氨基酸可能还是色氨酸

D.色氨酸和亮氨酸不可能在同一种蛋白质中出现

计算题：某中和池有含0.2%HCl的酸性废液800m³，欲使用工业烧碱将其中和，已知工业烧碱的密度为1.3g/L，其中NaOH的含量为30%，盐酸废液的密度为1.0g/L。求需要多少m³工业烧碱？