题干

如图所示,质量分别为mA=2  kg和mB=3  kg的A、B两物块,用劲度系数为k的轻弹簧相连后竖直放在水平面上,今用大小为F=45  N的力把物块A向下压而使之处于静止,突然撤去压力,则(    )

A:物块B有可能离开水平面

B:物块B不可能离开水平面

C:只要k足够小,物块B就可能离开水平面

D:只要k足够大,物块B就可能离开水平面

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B

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    How many girls in this world fall behind? The answer is hard—too many to count. This is why the phrase “Go Get It Girl” popped up in my head one day. This would be my project. Thus begins the journey of my Cold Award project, the largest and most important step of Girl Scouts (女童子军).

    “Go Get It Girl” is a girl's self-empowerment (自我授权) project centered on a website called gogetitgirl.org. It focuses on areas including education, health, and financial literacy. The education section includes information on applying to college and, maintaining good grades. The health section contains information on basic health and self-respect. Lastly, the financial literacy section has all the information a girl needs to manage her money properly.

    As part of my project, I was able to work one-on-one with girls in elementary, middle, and high school. I gave a speech at a local high school's College Night. I spoke to Hispanic girls and their parents about applying to college. In addition, I worked with an organization called Cool Girls, Inc. Cool Girls is an organization focused on the advancement of girls in all aspects of their development. I worked at the afterschool program, Cool Girls Club. The girls I worked with were primarily minorities, and Cool Girls truly helps them to rise above any current difficulties in their lives.

    To provide inspiration for the girls who visit gogetitgirl.org, I interviewed successful women in my community, including a doctor and business owner.

The project has been a lot of work, arid it's not over yet. It will never be over, hopefully, because I will always look for ways to help girls.