______ of the teachers in our school is 118 and _____ of them are women teachers.
A:The number, first fourth
B:The number, one fourth
C:A number, first fourth
D:A number, one fourth
下列关于美国总统的叙述,不正确的是
史学家吕思勉认为:法家之学,在先秦诸子中,是最新颖的,最适合于时势的。……但法家之学,亦有落伍之处。……社会的利益,彻头彻尾,都可用国家做工具去达到,就有将国权扩张得过大之弊。这里的“落伍之处”是指( )
已知:如图,在△ABC中,∠ACB=90°,CD⊥AB,垂足是D,BC=6,BD=1.求AD=____
1gNH3含N个氢原子,则阿伏伽德罗常数为( )