【单选题】各种原材料应按品种 ( )贮存,每批原材料均有明显标志,同一库内不得贮存相互影响风味的原材料。
【单选题】One of the few things you _____ say about English people with certainty is that they talk a lot about the weather. [ ]
【单选题】It is implied in the passage that one of the reasons that people often talk about UFOs may be that ______.
A.
they want to tell lies
B.
they don't live in the large cities
C.
there are only few witnesses
D.
the cases are interesting although not reliable
【单选题】One of the few things you ______say about English people with certainty is that they talk a lot about the weather. [ ]
【简答题】在如图所示的几何体中,四边形ABCD为正方形, 为直角三角形, ,且 . (1)证明:平面 平面 ; (2)若AB=2AE,求异面直线BE与AC所成角的余弦值.
【判断题】按碳在铸铁中存在的形态及形式,铸铁可分为白口铸铁、灰铸铁、球墨铸铁及可锻铸铁。()
【单选题】铸铁的种类有:灰口铸铁、可锻铸铁、白口铸铁、合金铸铁及()。
【单选题】某药品零售药店为了获得最大的经济效益,从甲药品生产企业购进的药品有效成分低于国家标准的药品。下列情形不属于生产、销售劣药从重处罚情节的是