针对原油物性的影响，可以采取向套管内加入（）化学药剂的方法，达到提高系统效率的目的。

用治风湿痹痛日久兼肝肾不足、腰膝酸软的常用药物有

A．桑寄生

B．狗脊

C．五加皮

D．香加皮

E．千年健

Sam, an unemployed piano tuner, said it was only the second thing he had ever won in his life. The first thing was an Afghan blanket at a church raffle when he was 25 years old. But this was much bigger: it was $120,000! He had won the Big Cube, a state lottery game. To win, a contestant must first guess which number a spinning cube will stop on. The cube has six numbers on it: 1X, 10X, 50X, 100X, 500X, and 1000X. If he is correct, the contestant must then guess which of two selected variables is going to be greater. So, just guessing which number appears on the cube does not guarantee that you will win any money. Sam correctly guessed 1000X, but he still had to choose between two variables. One variable was the number of cars that would run the stop sign at Hill Street and Lake Avenue in six hours. The other variable was the number of times that a teenage boy would change TV channels in a three-hour period. This was a tough decision.

Finally, Sam flipped a coin. It came up heads, so Sam picked the teenager. He picked right. The stop sign was run only 76 times, but the teen clicked 120 times. Sixty-year-old Sam jumped for joy, for he had just won 1000 times 120, or $120,000. Sam dreamily left the lottery studio. Talking excitedly on his cell phone while crossing the street, he got hit by a little sports car.

Sam is slowly getting better. He was in the hospital for a month. His hospital bill was $110,000. And the insurance company for the little sports car's owner sued Sam for $9,000 worth of repairs. Also, Sam still has to pay federal taxes on his winnings. Sam doesn't play the state lottery any more. He says it's better to be unlucky.

小题1:When Sam won the second thing that he’d won in his life, he was ______.  

A．25 years old

B．six years old

C．76 years old

D．sixty years old小题2:To win the game, the contestants had to make ______ guesses.    

A．three

B．two

C．six

D．four小题3:Sam won the lottery because ______.

A．he was lucky

B．he was good at math

C．he was smart

D．he was tough小题4:Sam’s experience shows that ______

A．everything has its time and that time must be watched.

B．he who risks nothing, gains nothing.

C．everything comes to him who waits.

D．he who laughs on Friday will weep on Sunday.

以下各种检验中，直接通过人的感觉器官进行检验的是（）

A、数量检验

B、商品外观检验

C、商品的尺寸检验

D、理化检验

按表面的性质不同，基本体通常分为（）和（）.

非均匀冰荷载