【简答题】试证两个相同材料的薄凸透镜组合消放大率色差的条件是 ,式中d表示两薄透镜的间距。
【判断题】电磁透镜具有和光学薄凸透镜类似的光学性质,故在电子光路图中采用折线表示电子直线运动及会聚轨迹,将电磁透镜都画为薄凸透镜或用透镜主平面表示。
【简答题】以陕北民歌“信天游”的形式写成的抒情诗的代表作是()。
【单选题】Analyze the following statement, and then choose one of the options that you think is best to use in academic writing:These results suggest a possibility that CTD could change its position relative to...
A.
These results suggest that under specific conditions, CTD changes its position relative to NHL domain
B.
We assume that these results suggest that CTD could change its position relative to NHL domain under certain conditions.
C.
These results might suggest that CTD changes its position relative to NHL domain, at least under certain conditions.
D.
We believe that CTD could change its position relative to NHL domain under certain conditions.
E.
These results make us believe that CTD could change its position relative to NHL domain.
【单选题】与肌肉组织比较,肝脏能够将糖原直接分解为葡萄糖,主要具有下列特殊的酶活性
【多选题】从中药水提取液中萃取亲脂性成分,常用的溶剂是
【多选题】从中药水提取液中萃取亲脂性成分,常用的溶剂是
【单选题】薄透镜表示( )。
C.
镜片厚度远小于透镜两个曲率半径中最大的那个曲率半径
D.
镜片厚度远小于透镜两个曲率半径中最小的那个曲率半径
【简答题】以陕北民歌“信天游”的形式写成的抒情诗代表作是《 》。建国后,其诗歌类型分为两类,一类是 ,如《桂林山水歌》;一类是长篇政治抒情诗,如《雷锋之歌》。
【多选题】从中药水提取液中萃取亲脂性成分常用的溶剂有