问题 填空题

在图18-2-4中画出了α粒子散射实验中的一些曲线,这些曲线中可能是α粒子的径迹的是(   )

图18-2-4

A.a

B.b

C.c

D.d

答案

BD

α粒子与金原子核均带正电,相互排斥,故不可能沿轨迹c运动;a轨迹弯曲程度很大,说明受到的库仑力很大,但α粒子离核较远,故a轨迹不可能存在而b轨迹正确;d轨迹是α粒子正对金原子核运动时的情况.

阅读理解

Company: KinderCare

Location: US-TX-College Station

Base Pay: 600$                       ,.

Employee Type: Full-Time Employee

Industry: Education-Teaching-Management

Job Type: Education

Required Education: 2 Years Degree

Required Experience: At Least 1 Year

Jobs So Desirable, We Hate To Call It Work... Looking for a great opportunity and the chance to make a difference? KinderCare Learning Centers is the leading for-profit provider of early childhood educational services and care in the country with nearly 120,000 children enrolled. Kinder­Care’s training is the key to providing high quality education and care for children 6 weeks to 12 years old. We are looking for devoted, responsible, and creative people for full-time and part-time positions at our centers located in College Station and Bryan, TX. REQUIREMENTS

Successful applicants will possess a High School diploma or GED, and at least 1 year of childcare experience. You must also have 12 credits (学分) in Early Childhood Education or be now enrolled in ECE classes and possess 6 credits in ECE.

We offer a wonderful work environment! If you have pre­vious education and/or experience in childcare and a love for children, we want to hear from you! Salary goes with experi­ence and position.

KinderCare offers a comprehensive benefits package, a competitive salary, and childcare discount. KinderCare is an Equal Opportunity Employer.

To apply, please contact us at:

Kinder Care Learning Centers

1711 Village Drive

College Station, TX 77840

Fax: (979) 696-6616

Email: [ Click here for email ] www. kindercare. corn

5. From the ad above, it seems that the company wants ______.

A. nurses        B. managers           C. trainees             D. teachers

6. According to the job requirements, people need to have _ __ to get the job.

A. experience and educational services

B. required education and experience

C. High School education and experience

D. 12 credits in Early Childhood Education

7. This ad probably appears in ______.

A. a radio program                         B. a newspaper

C. the introduction to the company             D. the website of the company

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