Disabled people are more respected. Even the government no longer____the belief that disabled people are improper as teachers.

A．contributes to

B．subscribes to

C．attends to

D．objects to

下列说法正确的是                                              

A．制普通玻璃的主要原料是烧碱、石灰石、石英

B．常用氢氟酸(HF)来刻蚀玻璃

C．用带玻璃塞的试剂瓶保存NaOH溶液

D．光导纤维的主要成分是硅