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过敏反应时引起组织水肿的原因是

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An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ,it will probably pass many (73) until it reaches the router attached to the destination network.A router receives a (74) from a network and passes it to another network.A router is usually attached to several networks.When it receives a packet,to which network should it pass the packet? The decision is based on optimization: Which of the available (75) is the optimum pathway?

A. modems
B. routers
C. switches
D. computers

下列关于氧化磷酸化偶联机制的化学渗透学说的描述哪一项是错误的?

A. H+不能自由通过线粒体内膜
B. 粒体膜内外H+形成跨膜梯度
C. 膜外侧pH比膜内侧高
D. 能量经ATP合酶的体、头部由Pi+ADP合成ATP

国家质检总局统一管理全国进出口商品免验工作,负责对申请免验生产企业的考核、审查批准和监督管理。()

A. 正确
B. 错误

对考核不合格的出口烟花爆竹的生产企业,整改后可申请复核,经复核后仍不合格,半年后才能重新申请。()

A. 正确
B. 错误

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