皮皮学，免费搜题
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【判断题】
在Word 2010编辑中,将鼠标指针放置到文档左侧的选定栏,按shift键单击鼠标,可以实现快速选定整个文档。( )A.
正确
B.
错误
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
【单选题】Since the introduction of the new technique, the production cost______greatly.
A.
reduces
B.
has been reduced
C.
is reducing
D.
is reduced
【单选题】Since the introduction of the new technique, the production cost ______ greatly.
A.
reduces
B.
is reduced
C.
is reducing
D.
has been reduced
【简答题】Since the introduction of the new technique, the (produce) ______ cost has been reduced greatly.