题干

一艘潜水艇排水量为3090t,在海面下某一深度巡航时,它所受到的浮力大小为____N;当它在海面下继续下潜的过程中,它所受到的浮力大小将____(填“变大”、“变小”或“不变”).(ρ海水=1.03×103kg/m3
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答案(点此获取答案解析)

3.09×107,不变

同类题3

根据短文理解,选择正确答案。

    In choosing a friend, one should be very careful. A good friend can help you study. You can have fun together and make each other happy. Sometimes you will meet fair­weather friends. They will be with you as long as you have money or luck,but when you are down, they will run away. How do I know when I have found a good friend? I look for certain qualities of character,especially understanding, honesty and reliability(信任).

    Above all else, I look for understanding in a friend. A good friend tries to understand how another person is feeling. He is not quick to judge. Instead, he tries to learn from others. He puts himself in the other person's place, and he tries to think of ways to be helpful. He is also a good listener.

    At the same time, however, a good friend is honest. He does not look for faults in others. He notices their good points. In short, a friend will try to understand me and accept me.

    Another quality of a friend is reliability. I can always depend on a good friend. If he tells me he will meet me somewhere at a certain time, I can be sure that he will be there. If I need a favor,he will do his best to help me. If I am in trouble, he will not run away from me.

    There is a fourth quality that makes a friend special. A special friend is someone with whom we can have fun. We should enjoy our lives, and we would enjoy our friendship. That is why I especially like friends who are fun to be with. A good friend likes the same things I like. We share experience and learn from each other. A good friend has a good sense of humor too. He likes to laugh with me. That is how we share in the joy of being friends. And I know that he is looking for the same quality in me.

    When I meet someone who is reliable, honest, and understanding,I know I've found a friend!

同类题4

阅读理解

    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.