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生态系统的基本特征?
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【简答题】Long long ago, there was a small village. This village had a 36 tradition. At the beginning of every year, any boy who had reached the age of majority (成年) was given land and money to build a home....
【简答题】Long long ago, there was a small village. This village had a 36 tradition. At the beginning of every year, any boy who had reached the age of 18 was given land and money to build a home. The boy had t...
【简答题】中国古代家具的发展,公认的大约可以分为四个时期(萌芽发生时期、成长壮大时期、____、成熟鼎盛时期),在不同的时期又可细分为几个阶段。
【单选题】患者，女，32岁。右眼视物模糊3年余，影像学检查如下图。 该病常见的临床表现是（）
A.
失明
B.
头痛、呕吐
C.
无痛性渐进性眼球突出
D.
斜视
E.
视网膜脱落
F.
以上都是
【简答题】电路如下图,二极管是理想的,判断图的二极管工作状态是导通还是截止,并求AO两端的电压值。
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