A:原子序数是14
B:原子个数是14
C:相对原子质量是14
D:质子数是28.09
读 《最苦与最乐》,文章最后所说的“卸却”责任与“解除”责任有何不同?
已知集合 A={x|﹣2≤x≤3},B={x|x<﹣1},则集合A∩B=( )
—I'm sorry I stepped outside for a smoke.I was very tired.
—There's no________for this while you are on duty.