()应作为政府采购的主要采购方式。
A.公开招标
B.邀请招标
C.竞争性谈判
D.单一来源采购
参考答案:A
I was surprised to see______at the concert.
A.those number of people
B.that amount of people
C.that number of people
D.those amount of people
测血压时肢体放得过高,测得血压值应偏
A.高
B.低
C.收缩压高
D.舒张压低
E.脉压差增加