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【简答题】
蜗杆传动有何特点?[中科院2005研]
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】营养性巨幼红细胞性贫血的典型骨髓象特点是
A.
成熟红细胞增生为主
B.
幼稚红细胞增生活跃为主
C.
血小板增生活跃为主
D.
白细胞增生活跃为主
E.
巨大幼稚红细胞增生活跃为主
【简答题】His wife still took care of him. But he thought she was acting _____ pity. He hated to be a burden on her ____ the rest of his life, and he decided he might as well put an end _____ it.