The use of Chinese by teachers in ______ English classroom must be restricted because it will decrease _______ time when students are exposed to the English language.

A．the; /

B．an; /

C．/; the

D．an; the

编制初稿阶段要测算概算定额水平的内容包括( )。

A．收集和整理各种数据

B．预算定额与劳动定额的水平测算

C．新编概算定额与原概算定额的水平测算

D．概算定额与预算定额的水平测算

E．新编概算指标与原概算指标的水平测算