【简答题】Various factors are considered when deciding on______.
【简答题】薄层板展开时常会出现边缘效应,消除边缘效应的方法是______。
【单选题】People should ______ when deciding wheher to have a negative rich environment.
A.
note their own reactions
B.
move to a healthier area
C.
observe domestic animals
D.
watch how wealthy people behave
【单选题】下面那种说法是错误的?
A.
作为职场利器,Excel是个非常好的建模工具。
【简答题】Enterprises have more choices when deciding where to broadcast ads.
【简答题】用薄层色谱法鉴别生药时,一般选用已知的()或()相对比,经薄层展开后,用一定的方法显色,样品色谱应与对照物色谱在相应的位置上,具有相同颜色的斑点或主斑点。