aInforme de Examen 检查报告[translate] aAn analytical dynamic model considering tooth modifications for a helical planetary gear is proposed in the first place to provide deterministic analysis on gear dynamic behaviors. 考虑牙修改为一个螺线行星的一个分析动态模型在冠军在齿轮戏剧性举动提议提供确定分析。
A. To determine whether the polar bear was in danger. B. To measure how fast the sea ice melts in the Arctic. C. To check the predictions of the computer models. D. To find out the exact number of the polar bear. 2.What causes the polar bears to disappear by 2050? A. The pollu...
“Brain anatomy varies across dog breeds and it appears that at least some of this variation is due to selective breeding for particular behaviors like hunting, herding and guarding,” neuroscientist and lead author of the study Erin Hecht toldTheWashington Post. ...