对亚临床肝性脑病最有诊断价值的是（）。
A.视觉诱发电位
B.躯体诱发电位
C.脑电图
D.简易智力测验
E.血氨
参考答案：D
对于那些与采购单位的采购业务不是很重要的供应商，可以很方便地选择和更换，那么这些与采购业务对应的供应商就是（）
A.商业型供应商
B.优先型供应商
C.重点型供应商
D.伙伴型供应商
____________ people went to the concert which was held in People’s Square the night of May Day.
A．Three thousand, in
B．Thousands, on
C．Many thousand, in
D．Thousands of, on
