9.8的19倍是______,比x的3倍少12的数是______.
9.8×19=186.2;比x的3倍少12的数是3x-12.
故答案为:186.2,3x-12.
如果不动显微镜的其他部分,只是转动转换器,将物镜由10×转换成45×。这时显微镜的视野将会 [ ]
A.变亮
B.变暗
C.无变化
D.变化无规律
—Sir, I feel it complicated to apply to a university abroad.
—Why not read our guide? This is ________ the relevant information is available.
A.what
B.how
C.where
D.why