Speech is the most important means of communication between people. But it is not the only one. Nor is it the oldest. We use facial expressions, gestures and hand movements to express our feelings and to send signals to other people. Animals use this "body language" a great deal. The sign language used by deaf people is an example of communication without speech, while blind people communicate largely through touch and hearing.
According to the passage, what would happen to us without communication?
A.We should learn everything for ourselves.
B.We would become unable to speak.
C.We couldn't live happily.
D.We might have to do everything by ourselves.
第2题
A.星形细胞起源肿瘤
B.少突胶质细胞起源肿瘤
C.所有含有神经元成分的神经上皮组织起源肿瘤
D.室管膜起源肿瘤
E.脉络丛起源肿瘤
第4题
A.神经元与神经元之间
B.神经元与神经元之间,或神经元与效应细胞之间
C.神经元与神经元之间,或神经元与神经胶质细胞之间
D.神经元与神经元之间,或神经胶质细胞与神经胶质细胞之间
第5题
A.神经元与神经元之间
B.神经元与神经元之间,或神经元与效应细胞之间
C.神经元与神经元之间,或神经元与神经胶质细胞之间
D.神经元与神经元之间,或神经胶质细胞与神经胶质细胞之间
第6题
A、神经元、神经胶质和血管系统
B、上皮细胞、神经元和血管系统
C、上皮细胞、内皮细胞和血管系统
D、上皮细胞、神经胶质和神经元
E、内皮细胞、神经胶质和神经元
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