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【判断题】
用多段线PLINE命令不仅可以绘制圆弧还可以绘制椭圆弧。A.
正确
B.
错误
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【简答题】Last year was the first year when I taught the fifth grade. Recently, I’ve been 1 by a “graduated ”student for the first time. I was really surprised when he walked into my home. He hasn’t physically ...
【简答题】If I ware rich，I ______________ (买了那栋房子)last year．
【单选题】— Where were you in July last year? — This time last year my family and I _____ Beijing. [ ]
A.
was visiting
B.
visited
C.
had visited
D.
were visiting
【简答题】一对有耳垂的夫妇，为什么会生下一个无耳垂的子女呢？下面的图解可以说明其中的道理。 (1)上图说明，人类决定________性状的基因是显性基因，决定_________性状的基因为隐性基因。 (2)在进行生殖时，该子女的父母分别产生________种类型的精子和卵细胞。当含有_______基因的精子和_________基因的卵细胞结合时，所生子女的性状就表现为无耳垂。 (3)在生物的传种接代中，__...
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