皮皮学，免费搜题
登录
搜题
【单选题】
在DB技术中,"脏数据"是指A.
未回退的数据
B.
所有回退的数据
C.
未提交的数据
D.
未提交随后又被撤销的数据
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Many students believe that the choice of their universities and courses should __________ their own interest.
A.
base in
B.
base on
C.
be based in
D.
be based on
【判断题】Many linguists believe that these, along with other properties of presuppositions, are inherent in a particular morpheme, lexical item, or a structure.()
A.
正确
B.
错误
【单选题】As many successful businessmen believe, courage is as ______ to pioneering work as the intelligence, even more so．
A.
accessible
B.
essential
C.
alternative
D.
commercial
【单选题】Many women are too concerned _____ staying thin and they believe that vitamins are some kind of magic cure to replace food .
A.
at
B.
in
C.
for
D.
to
相关题目：