亚基解聚时()。
A.一级结构破坏
B.二级结构破坏
C.三级结构破坏
D.四级结构破坏
E.空间结构破坏
参考答案:D
________(free) from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise.
与全叶打叶相比采用切尖打叶复烤的优点如下:()
A.提高大片率
B.减少造碎
C.减轻打叶设备的负荷
D.提高烟叶品质