A. It has numerous traits in common with the spotted owl.B. Its population is
A. It has numerous traits in common with the spotted owl.
B. Its population is increasing.
C. It may not survive without special efforts of conservationists.
D. Its role in the chain of evolution has not yet been examined.
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由8个触发器构成计数器,它的计数状态最多为______个。
在3位二进制A/D转换器中,已知最大输入模拟电压为10V,△是量化单位,并采用“只舍不取”方法划分量化电平,则1△代
男,45岁。风湿性心脏瓣膜病史20年,心房颤动5年。就诊时,P160次/分,心房颤动,BP100/70mmHg。
A. 临时心脏起搏器植入
B. 肾上腺素
C. 直流电复律
D. 毛花苷丙(西地兰)
E. 阿托品下列各例治疗应首选
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