B328包含下列哪些单板？（）
A.BCCS
B.TORN
C.IIA
D.TBPE
参考答案：A, B, C, D
Betty and John have come back , but ______ students in the class aren't here yet. [ ]
A. the other
B. others
C. another
D. the others
B．有（n-2）个中子
C．核子数是（N-3）
D．原子序数是（N-n-2）
