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【多选题】
按照项目采购方式的不同,可将项目采购分为( )。A.
公开竞争性招标采购
B.
有限竞争性采购
C.
询价采购
D.
直接采购
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】We should ______ when we receive a suspicious letter.
【单选题】__________ we had read your letter __________ the true state of affairs.
A.
It was until; that we understood
B.
It was not until; we understood
C.
Until; did not we understood
D.
Not until; did we understood
【简答题】From the letter，we can know＿＿＿．
【单选题】______ an answer, he decided to write another letter to them.
A.
Receiving
B.
Not being received
C.
Having not received
D.
Not having received
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