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【单选题】

人类和黑猩猩拥有一个最近的共同祖先,在通往人属(Homo)这一支谱系中(包括所有已灭绝的物种),最早出现了下列哪个性状或行为?

A.
直立行走
B.
脑容量增大
C.
驯化野生植物
D.
驯养野生动物
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题目标签:同祖性状黑猩猩
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参考解析:
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【多选题】党参的性状特征为

A.
圆柱形,根头部有“狮子盘头”
B.
表面黄棕色至灰棕色,根头下有致密的横纹,眉状疤痕或黑褐色胶状物
C.
质稍硬或略带韧性
D.
断面皮部淡黄白色至淡棕色,木部淡黄色
E.
气微,味苦

【单选题】Passage Three Musicians are fascinated with the possibility that music may be found in nature; it makes our own desire for art seem all the more essential. Over the past few years no les...

A.
music should replace language as the major arena of animal research
B.
animal experiments are more often than not cruel and inhuman
C.
great progress has been made in the field of interspecies communication
D.
the experiment with music may help scientific research on animals

【单选题】肺炎链球菌肺炎典型的痰液性状是()

A.
铁锈色痰
B.
白色黏痰
C.
棕红色痰
D.
灰白色浆液痰
E.
粉红色泡沫样痰