如图所示，A、B两质量相等的物体原来静止在平板小车C上，A和B间夹一被压缩了的轻

发布时间：2017-04-19 11:20 │ 来源：www.tikuol.com

题型：不定项选择

问题：

如图所示，A、B两质量相等的物体原来静止在平板小车C上，A和B间夹一被压缩了的轻弹簧，A、B与平板车上表面的动摩擦因数之比为3:2，地面光滑。当弹簧突然释放后，A、B相对C滑动的过程中

[ ]

A．A、B系统动量守恒

B．A、B、C系统动量守恒

C．小车向左运动

D．小车向右运动

考点：动量守恒定律

题型：不定项选择

阅读理解。

                                                        JOB APPLICATION FORM
Your name:        Julia Morley
Address:             18 Jackson Street, Elisabeth, Arizona 85376
Phone number: (623)555-1212
E-mail address: Jmorley@gnpu.net

High School       Robert Morris High School
Key courses       Computer 3 years; Math 4 years; Chemistry 2 years
Language         Japanese, 3 years (reading, writing, speaking);
                        French, 2 years (reading, writing)
Experience        Delivering milk; taking food orders at Brown's
Interests           I like travelling and playing football after school.
                        I often play football with my friends and I usually travel on my holidays.
                         I enjoying working with people and helping them.

生词: application 申请

1. Julia Morley is trying to ____.

A. find a job
B. learn English
C. travel around
D. deliver milk

2. How many foreign languages did Julia learn?

A. One
B. Two
C. Three
D. Four

3. Julia is interested in ____.

A. reading and writing
B. delivering milk and taking food orders
C. learning language
D. traveling and playing football

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对于以下企业债券类型，对发行企业资质要求最高的是（）。

A．抵押债券

B．担保信托债券

C．信用债券

D．担保债券

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光合作用的原料是（　　）

A．光

B．叶绿体

C．淀粉和氧气

D．二氧化碳和水

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谈一谈实施新的课程标准后教师角色的转变？

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6-Q-462型新蓄电池充电时间，第二阶段是（）。

A、12～16h

B、40～50h

C、10～11h

D、45～55h

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