自动低频减负荷装置动作后稳态频率一般恢复到（）以上。 A.48.5Hz B.49Hz

某物体运动的速度图像如图，根据图像可知

A．0-2s内的加速度为1m/s²

B．0-5s内的位移为10m

C．第1s末与第3s末的速度方向相同

D．第1s末与第5s末加速度方向相同

制锁角是指（）.

A.倒凹区牙面与基牙长轴之间的夹角

B.义齿就位道与基牙长轴之间的夹角

C.倒凹区牙面与义齿就位道之间的夹角

D.义齿就位道与脱位道之间的夹角

E.义齿就位道与模型观测器分析杆的夹角

2009年9月5日，家住A市C县的李某因打架斗殴而被A市B县公安局予以7天拘留的处罚，李某不服，释放后向相关机关申请复议，又不服复议决定向法院提起诉讼。请回答下列问题：

如果A市公安局作为本案的复议机关改变了B县公安局的处罚决定，李某又对该改变的处罚决定不服，则本案的管辖法院是( )。

A．应当由A市公安局所在地法院管辖

B．应当由B县公安局所在地法院管辖

C．可以由B县公安局所在地法院管辖

D．可以由李某选择A市公安局所在地法院或B县公安局所在地法院管辖

Have you ever been afraid to talk back when you were treated unfairly Have you ever bought something just because the salesman talked you into it Are you afraid to ask a boy (girl) for a date

Many people are afraid to assert themselves (insist upon their own rights). Dr. Robert Alberti, author of Stand Up, Speak Out, and Talk Back, thinks it’s because their self-esteem is low. "Our whole set-up makes people doubt themselves, " says Alberti. "There’s always a’ superior’ around—a parent, a teacher, a boss—who ’knows better’".

But Alberti and other scientists are doing something to help people to assert themselves. They offer "assertiveness training" courses (AT). In the AT courses people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be aggressive without hurting other people.

In one way, learning to speak out is to overcome fear. A group taking an AT course will help the timid person to lose his fear. But AT uses an even per motive—the need to share. The timid person speaks out in the group because he wants to tell how he feels. AT says you can get to feel good about yourself. And once you do, you can learn to speak out.

One thing AT doesn’t do is to（）

A. use the need of people to share

B. show people they have the right to be themselves

C. help people to be aggressive at anytime even when others suffer

D. help people overcome fear

改变涡轮喷气发动机喷管的最小截面的面积可以改变（）.

A.发动机的工作状态

B.反压

C.大气压

D.发动机的重量