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問答題
微生物最好的碳源是 ,尤其是 和 ,他們最容易被微生物吸收和利用。能用作微生物N源的物質有 , , 和 。
答案：
微生物最好的碳源是葡萄糖，尤其是葡萄糖和果糖，他們最容易被微生物吸收和利用。能用作微生物N源的物質有銨鹽、硝酸鹽和氨基酸...
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問答題
Furthermore, clothing that has survived from the past tends not to be typical of what was worn in daily life. Museum collections are full of fashionable ball gowns, for example, but have very few everyday dresses worn by ordinary working-class women.
Furthermore, clothing that has survived from the past tends not to be typical of what was worn in daily life. Museum collections are full of fashionable ball gowns, for example, but have very few everyday dresses worn by ordinary working-class women.
答案：
The passage suggests that the clothing preserved in museums ...
問答題
未設雙向閉塞設備的自動閉塞區(qū)間，遇軌道電路發(fā)生故障等情況，需使用總輔助按鈕改變閉塞方向時，車站值班員必須確認區(qū)間空閑后，根據列車調度員命令，使用總輔助按鈕改變閉塞方向，并在《行車設備檢查登記簿》內登記（）
A.正確
B．錯誤
B．錯誤
答案：
A. 正確 解析：在未設雙向閉塞設備的自動閉塞區(qū)間，如果軌道電路發(fā)生故障或其他情況需要改變閉塞方向時，車站值班員必須首...
