皮皮学，免费搜题
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搜题
【单选题】
腹腔器官恶性肿瘤常见什么途径转移A.
淋巴道
B.
血道
C.
种植
D.
直接
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Rudolph had to wear an iron leg brace at a very young age because _____.
A.
she dreamed of becoming the fastest woman in the world
B.
that was how she was trained to walk and run like other kids
C.
her left leg was crippled(致残的) due to several childhood illnesses
D.
her mother told her that with the leg brace she could do whatever she wanted to do
【简答题】分度圆上的模数和压力角相等,且为____________,齿厚和齿槽宽____________的齿轮,称为标准齿轮。
【简答题】分度圆上的压力角等于（），摸数取的是标准值，齿厚和齿槽宽相等的齿轮，称为标准齿轮。