The teacher rather than the students _____ referring to Reading Skills that _____newly published in America.

A．is; was

B．is; were

C．are; was

D．are; were

已知类A中有公用数据成员B *b；其中B为类名。则下列语句错误的是

A．A()：d(new {} A(const A &o：d(new

B．{*d= *od；}

C．～A( {}

D．～A(){delete d；}