Hardly ______ when a loud explosion was heard.
A.the train had started
B.the train had been started
C.had the train started
D.did the train start
第1题
韦伯斯特和温德将影响采购决策的因素分为4类:环境因素、组织因素、()因素和个人因素。
A.服务
B.人际
C.质量
D.企业
第2题
A.①②③④
B. ①②③⑤
C. ②③④⑤
D. ①②③④⑤
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