When the headmaster announced his plan in public at the school's opening ceremony, the ________

of the students present________ against it.[ ]

A. majority; were      

B. most; were  

C. most; did     

D. majority; did

弹簧管压力表中扇形齿轮上的调整螺钉的作用是（）

A.调零点

B.调线性

C.调量程

D.调灵敏度