题目

一质量为m的物体静止在光滑水平面上，从t=0时刻开始受到水平外力的作用．力的大小F与时间t的关系如图所示，力的方向保持不变，则下列说法中正确的是（） A . 物体在0～t0和t0～2t0水平外力做功之比是1：10 B . 物体在0～t0和t0～2t0水平外力做功之比是1：8 C . 外力在t0和2t0时刻的瞬时功率之比是1：8 D . 外力在t0和2t0时刻的瞬时功率之比是1：6 Fear plays no part in this latest problem．“I’m not afraid I'll lose my children．I won't lose my children. We live together, and nothing, nothing,”she repeats, her voice rising when speaking to John's lawyer, “will stop me from being with my children. A law? Year, right. Don't disturb me when it comes to my children. You are never going to win. If John wants to see them, I cannot stop him. He's their father????—I want them to see him! However, his visit in his present condition will disturb the children's stable (稳定的) life．”     John, who has spent much of his time in California recently, has only hired a house for himself in Pennsylvania, according to his lawyer. "If he'd like to stick to a regular life, I'd be more than happy to do that，" Jane says. "The best thing for any child of a divorced (离婚的) parent is a stable life. I want nothing more than for him to set up a stable life for himself, so that he can be part of making our children's lives more stable. "     While matters of money and care won't be settled for weeks, Jane hardly puts her life on hold. Last week the ABC network announced that Jane would return with her own show, Twist of Jane, in which she gives advice to other moms．Jane and her eight children will also return to ABC in a series  of  Jane Plus 8 specials showing them on various adventures．It’s a rest for Jane．who insists that she needs her new，busy life to provide for her family．“I have to lead such a life．and I’m thankful that I’ve built it to the top where now I can support my children．”she says．   And  whether a bellicose(好斗的)dance judge or a bellicose former wife，Jane plans to keep  0n facing attacks on her．  “Some people try to knock me down—only to make me more fierce，more protective，more determined to do better，”she says．“Go ahead，take me on．This will just make me stronger．” 1  According to Jane in the first paragraph，the low____________ A. can’t take her children away from her        B. can’t do anything with the case C. will best settle the problem                D.  will disturb her children 2 . What does “to do that” refer to in the second paragraph? A. To live with John．                    B．To hire a house for John． C．To allow John to see the children         D．To ask John to set up a regular life. 3. What does the underlined sentence in the third paragraph mean?  A．Jane’s life is very difficult．         B．Jane continues to live as usual．  C．Jane almost can’t control her lire      D．Jane works very hard to live a happy life． 4 . Which word can best describe Jane? A. Proud．    B．Fierce．    C．Determined．     D．Independent