![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
近几年西南烟草种植区烤烟样品中上部烟叶糖碱比值适宜和()氮碱比值适宜的样品比例明显提高。
A.中上部烟叶
B.中部烟叶
C.中下部烟叶
D.下部烟叶
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.中上部烟叶
B.中部烟叶
C.中下部烟叶
D.下部烟叶
A.0.73%~4.61%,2.35%
B.0.77%~3.89%,2.04%
C.0.76%~3.34%,1.78%
D.0.73%~4.61%,1.78%
A.10.22%~33.89%,24.54%
B.11.40%~34.06%,25.02%
C.9.77%~32.38%,22.35%
D.10.22%~33.89%,22.35%
A.3.72~41.19,14.87
B.2.95~37.63,11.02
C.2.14~25.82,7.38
D.3.72~41.19,7.38