成人每日分泌胆汁约为（） A.400～600ml B.600～800ml C.800

尿液的排泄量受多种因素影响，为了获得较准确的检测结果，通常采用尿比重校正法，把尿的比重校正到（）

A.1.010

B.1.015

C.1.020

D.1.025

E.1.030

下列关于剂量单位的描述，错误的是（）

A.放射性恬度单位是居里和贝克

B.照射量表示中等能量的γ或X射线照射物质的电离能力

C.吸收剂量是表示物质吸收射线能量的物理量

D.剂量当量表示各种射线被吸收后引起的生物学效应强弱的物理量

E.1mCi=37MBq

“佛指甲”的含义是

A．乌梢蛇尾部末端呈细长三角形

B．蕲蛇尾部末端呈细长三角形

C．金钱白花蛇尾部末端呈细长三角形

D．蕲蛇尾部末端有一长三角形角质鳞片

E．乌梢蛇尾部末端有-长三角形角质鳞片

Since 1989, Dave Thomas, who died at age 69, was one of the most recognizable faces on TV. He appeared in more than 800 commercials (商业广告) for the hamburger chain named for his daughter. “As long as it works," he said in 1991, “I'll continue to do those commercials."

Even though he was successful, Thomas remained troubled by his childhood. “He still won't let anyone see his feet, which are out of shape because he never had

properfitting shoes," Wendy said in 1993. Born to a single mother, he was adopted(收养) as a baby by Rex and Auleva Thomas of Kalamazoo in Michigan. After Auleva died when he was 5, Thomas spent years on the road as Rex traveled around seeking construction work. “He fed me," Thomas said, “and if I got out of line, he'd beat me."

Moving out on his own at 15, Thomas worked, first as a waiter, in many restauran

ts. But he had something much better in mind. “I thought if I owned a restaurant," he said, “I could eat for free." A 1956 meeting with Harland Sanders led Thomas to a career as the manager of a Kentucky Fried Chicken restaurant that made him a millionaire in 1968.

In 1969, after breaking with Sanders, Thomas started the first Wendy's Old Fashi

oned Hamburgers, in Columbus, Ohio, which set itself apart by serving made to order burgers. With 6,000 restaurants worldwide, the chain now makes$ 6 billion a year in sales.

Although troubled by his own experience with adoption, Thomas, married since 1954 to Lorraine, 66, and with four grown kids besides Wendy, felt it could offer afuture for other children. He started the Dave Thomas Foundation (基金会) for Adoption in 1992.

In 1993, Thomas, who had left school at 15, graduated from Coconut Creek High School in Florida. He even took Lorraine to the graduation dance party. The kids voted him Most Likely to Succeed.

“The Dave you saw on TV was the real Dave,"says friend Pat Williams. “He wasn't a great actor or a great speaker. He was just Joe Everybody."

1.What is the article mainly about?

A. The life of Dave Thomas.              B. The dream of Dave Thomas.

C. The schooling of Dave Thomas.          D. The growth of Dave Thomas's business.

2. What do we know about his childhood?

A.He lived a poor life.                  B.He had caring parents.

C.  He stayed in one place.              D.  He didn't go to school.

3.Choose the right time order of the following events in Thomas's life.

a.graduated from high school         b.started his own business

c.became a millionaire               d.started a foundation

e.met Harland Sanders

A. e，b，c，d，a，    B. a，e，c，b，d，      C. e，c，b，d，a，    D. a，e，b，c， 

4. “He was just Joe Everybody." (in the last paragraph) means  _______.

A. Dave was famous               B. Dave was ordinary

C. Dave was showy                D. Dave was shy 

5.What is the name of Dave Thomas's business?

A. Thomas's.         B. Wendy's.         C. Lorraine's.         D. Rex's. 

在对钢液内部进行脱氧时，一般采用复合脱氧剂，既可以提高这些元素脱氧能力，而且对提高（）有利。