质子数相同，核外电子数不同的两种粒子，它们不可能是（　　）

A．两种不同的元素的原子

B．同种元素的原子和离子

C．一种原子和一种原子团

D．一种分子和一种离子

MV SUDAN/MEAN AT 0200UTC IN POSITION 40.44N 141.52E PASSED A DERELICT ABOUT 40 TONS HALF SUBMERGED AND IS DRIFTING. This cable says that she met with possibly（）.

A.a floating wreck

B.a survivor at sea

C.a man who had fallen overboard

D.a drilling rig