一电子在匀强磁场中，以一正电荷为圆心在一圆轨道上运行．磁场方向垂直于它的运动平面，电场力恰好是磁场作用在电子上的磁场力的3倍，电子电荷量为e，质量为m，磁感应强度为B，那么电子运动的角速度可能为(　　)

    Now you are in a dinosaur ____park. Coming here, you will find a kind of old ____, dinosaur, which died out millions of years ago. In our park, we are happy to show you ____ dinosaurs, which lived in the Jurassic. The four-storied-building-high grass-eating dinosaurs are submissive (温顺的) and kind. You can ____ towards them and touch them. But the ____  of them are dangerous. The four-legged meat-eating dinosaurs are very cruel. Please don't ____ them and don't try to give them food. The ____ here is very thick and full of all kinds of animals that lived in the Jurassic. Without any special____and the leading of the guide, please don't step into it. OK, I'm sure that our park will ____anyone who comes here and you will ____a lot from it.

我国新《工伤保险条例》与原有条例相比，值得关注的变化是，补助金的发放标准打破了地区限制，实现全国“同命同价”。这说明，在我国（    ）