单项选择题 A1/A2型题：根据胸水的检查，请判断下列哪一种为渗出液（） A.外观淡黄色，蛋白含量 B.乳白色，

题型：阅读理解

阅读理解。

Dear Mom,

I'm sorry that I can't go back home for Mother's Day next week. On that day, I'll have to go to an

important meeting for my boss, who helps me a lot with my work and life here. But I'll find time to see

you at home soon.

Mom, thank you for everything you've done for Tim and me. After Dad died ten years ago, you had to

work in a supermarket in the daytime and in a restaurant at night. But you always gave us two your love and

care. Though you don't have to work now, I still remember your coming home and feeling tired many

evenings.

Tim is going to finish his studies next month. He said he would move back from school and look for a

job neat home. I'm glad you won't live by yourself anymore. Let's plan to take a trip in the near future. It's

been years since the three of us took a trip together.

Happy Mother's Day. I love you, Mom.

Best wishes,

John

1. What can we learn about John's mother?

A. She lives by herself now.

B. She still works day and night.

C. She will make a plan to save money.

D. She used to be too busy to care for her children.

2. What do we know from the letter?

A. John has two brothers.

B. John is unhappy with his boss.

C. John has to work on Mother's Day.

D. Tim will leave home for his job soon.

3. Which is said in the letter?

A. John's father died at work.

B. Tim will look for a teaching job.

C. John bought a gift for his mother.

D. John hopes to take a trip with his family.

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题型：单项选择题 A型题

当满足电子平衡条件时，吸收剂量和比释动能什么情况下数值上相等（）

A.加上俄歇电子的能量时

B.加上韧致辐射损失的能量时

C.忽略韧致辐射损失的能量时

D.忽略俄歇电子的能量时

E.加上俄歇电子和韧致辐射损失的能量时

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题型：单项选择题 A1/A2型题

下列哪种物质是次级胆汁酸（）。

A.脱氧胆酸

B.鹅脱氧胆酸

C.甘氨胆酸

D.牛磺胆酸

E.甘氨鹅脱氧胆酸

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题型：单项选择题

SQL语言具有多种优点，你知道SQL是哪年成为关系数据库语言的国际准的______

A) 1986年
B) 1987年
C) 1988年
D) 1989年

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题型：单项选择题

下列哪种方法可去除食品中的黄曲霉毒素（）

A.加碱

B.加酸

C.加热

D.紫外线照射

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根据胸水的检查，请判断下列哪一种为渗出液（） A.外观淡黄色，蛋白含量 B.乳白色，

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