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【单选题】
非正品大黄药材横切面A.
根无星点
B.
根茎有星点
C.
根和根茎都有星点
D.
根和根茎均无星点
E.
除藏边大黄外根茎均无星点
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【简答题】阅读短文，根据短文内容判断句子正误（正确用“T”表示、错误用“F”表示）。 Here's a story about a famous woman in Australia. Her name is Sandy Green. Sandy is a famous Australian actress and singer. When she nearly finished school, she h...
【简答题】确定组成建筑形体的各基本形体大小的尺寸称为 。
【简答题】Tell whether the following statements are true or false. (阅读短文判断正误，正确的用“T”表示，错误的用“F”表示)。 American children love watching TV. Some of them spend six hours a day at school and four to six hours a day in...
【简答题】阅读短文，判断正误，用“T”或“F”表示。 Miss White is a teacher. Her home is near her school. She walks there in the morning. All her students are very small. It's a cold and windy morning. Miss White walks to school. ...
【简答题】阅读理解：阅读短文，完成后面5个小题，正确的“T”用表示，错误的用表示“F”。 A water-saving campaign was started among school children in Beijing to spread the message of Green Olympic. 'Which seasons see more precipitation (江水) in Beiji...
【简答题】阅读短文，判断正误，正确的用“T”表示，错误的用“F”表示。 Mike is a small boy. He hates (讨厌) soap and water. His mother says,'Mike, your hands are very dirty. Go and wash your hands.' Mike washes his hands in the water quickly....
【多选题】关于螺杆参数对挤出成型的影响,下列描述正确的是
A.
螺杆直径适当增大，塑化效果越好
B.
长径比偏高，物料塑化更均匀
C.
压缩比增大，有利于物料塑化均匀
D.
螺槽深度越小，对物料剪切速率越大，有利于传热和塑化，提高生产率
E.
螺旋角越大，挤出机生产效率提高，塑化效果有所提升
F.
螺纹棱部宽度增大，可以减少漏流，提高产量
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