We are in great need of a more capable manager, ________ with straightforward persona

lity as well as good humor.

A．the one

B．who

C．which

D．one

已知₃₃As、₃₅Br位于同一周期，下列关系正确的是

A．原子半径：As＞C1＞P

B．热稳定性：HC1＞AsH₃＞HBr

C．还原性：As^3-＞S^2-＞C1^-

D．酸性：H₃AsO₄＞H₂SO₄＞H₃PO₄