问题 选择题

下列有关细胞的叙述,正确的是[ ]

A.核糖体是由蛋白质和tRNA组成

B.中心体在洋葱根尖分生区细胞有丝分裂的过程中发挥重要作用

C.内质网与蛋白质、脂质和核糖核酸的合成有关

D.溶酶体内含有多种水解酶,能吞噬并杀死侵入细胞的病毒或病菌

答案

答案:D

填空题
阅读理解

阅读理解。

     Our particular parenting style reflects our own way o f"looking". Here's a great piece of writing reflecting

parent's particular ways on the parenting style that have become known humorously as helicopter parenting

and submarine (潜水艇) parenting. Helicopter parents hover over their children, managing every aspect of their

child's life. On the contrary, submarine parents remain"hidden" coming to the surface when guidance is needed.

     While helicopter parents may have the best intentions, in reality, they are raising children with few problem

solving skills. Children with hovering parents never get the chance to face disappointment and build up their

ability to recover from misfortune.

     Think about your typical submarine. Submarines usually remain underwater. In case of a need for

emergency surfacing, submarines can rise so quickly they are driven partially out of the water. Submarine

parents also remain out of sight, yet able to pop up in the case of an emergency.

      I admit I'm a submarine mom. My job as a parent is to have fun with my daughters while letting them

explore and learn natural consequences.

     My older daughter found herself acting in commercials and making more than minimum wage as a teen.

To give her a sense of the real world, I insisted she spend three weeks every summer, picking strawberries

and earning $3.50 on a good day.

     When my youngest daughter Sondra was six, she wanted a very expensive American Girl Doll. I cut the

full color 18" picture out of the American Girl catalogue and had it laminated (压膜)."Here's your American

Girl Doll." I said"When you turn nine, I'll buy you the 3D doll on your birthday." Sondra played with her flat

doll for months, making clothes and furniture for her. She learned creativity. I saved $88.00.

1. What is the text mainly about?

A. Various means of transportation.

B. Funny experiences of a mom.

C. Humorous stories about parents.

D. Different styles of parenting.

2. The underlined phrase "hover over" in Paragraph 2 is closest in meaning to"______".

A. leave behind

B. fly around

C. watch over

D. set aside

3. Which of the following is true of helicopter parents?

A. They give their children proper guidance.

B. They try to do everything for their children.

C. They teach their children how to face failures.

D. They help their children explore by themselves.

4. It can be inferred from the last two paragraphs that Mom _______.

A. has good parenting skills

B. is always making promises

C. is strict with her daughter

D. tries her best to save money

5. The author supports her point of view mainly by________.

A. stating facts and offering advice

B. using figures and giving evidence

C. analyzing data and drawing conclusions

D. making comparisons and giving examples