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【判断题】
颗粒在静止的流体中沉降时，在同一雷诺数Re值下，颗粒的球形度越大，阻力系数越小。( )A.
正确
B.
错误
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举一反三
【简答题】一、填入单词，完成下面一段话。一空一词。 Welcome 1________ the Science Center (科技中心). We 3________ an exhibition hall (展厅) and a movies show room 2________ the first floor. The exhibition 4________ is on 5________ left a...
【简答题】近代科学颜色成因理论包括 、 、 和 致色。
【简答题】看图完成答句，一空一词。 1. Who are in the picture? Some __________ and a __________ are in the picture. 2. How many students are there in the picture? There are __________. We can see __________ of them are boys...
【单选题】Where is Hank going to get the snacks to take to Bill's house?
A.
from his house
B.
from the store
C.
from his work
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