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问题 多项选择题

血细胞发育过程中的一般规律描述不正确的是（）

A.胞质嗜碱性逐渐加强

B.胞核由小到大变化

C.核染色质结构由疏松细致到粗糙

D.核仁从无到有

E.胞质中颗粒从多到少

答案

参考答案：A, B, D, E

单项选择题

对M1乙酰胆碱受体具有较高选择性的药物为

A．溴丙胺太林(Propantheline Bromid

B．贝那替秦(Benactyzin

C．盐酸苯海索(Trihexyphenidyl Hy-drochlorid

D．哌仑西平(Pirenzepin

E．樟柳碱(Anisodin
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单项选择题

In (66) the strength of the carrier signal is varied to represent binary 1 or 0. (67) is a system that can map a name to an address and conversely an address to al name. (68) is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol. (69) is an approach that enables an ATM switch to behave like a LAN switch. (70) is an guided media which is made of glass or plastic and transmits signals in the form of light.

A．Coaxial cable

B．Optical fiber

C．Unshielded Twisted-pair Cable

D．Shielded Twisted-pair Cable
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