面部软组织出血时，应该压迫哪一动脉（）
A.舌动脉
B.面动脉
C.耳后动脉
D.颌内动脉
E.上唇动脉
参考答案：B
（-5）3×4000用科学记数法表示为______．
28．—How much sugar did you put in my coffee? It tastes so bitter．
—I am sorry to say that there’s ________left．I’ve forgotten to buy ______on my way
home．
A．nothing；it
B．something；anything
C．none；some
D．no one；some
