能准确反映体内贮存铁量的指标为A．骨髓铁染色 B．总铁结合力 C．血清铁 D．血清铁

Either I or one of your students _____to attend the meeting

that is due tomorrow.

A .are   B. is   C .have   C. be 

There is ________ elephant in the picture.

A．a

B．an

C．the

D．\

砖隔墙一般不宜超过2m高。( )

He（）the children so badly that hey were terrified of him.

A.behaved

B.treated

C.dealt

D.acted

液压式压力测量仪表常称为液柱式压力计，它所测压力一般不超过（）。

A.0.1MPa

B.0.2MPa

C.0.3MPa

D.0.4MPa