下列反应不属于缓慢氧化的是（ ） A．动植物的呼吸作用 B．铁制品锈蚀 C．食品

已知直线y=2x+1。

（1）求已知直线与y轴的交点A的坐标；

（2） 若直线y=kx+b与已知直线关于y轴对称，求k与b的值。

急性呼吸窘迫综合征（ARDS）诊断标准包括（）。

A.急性起病

B.氧合指数（PaO₂/FiO₂）≤200mmHg

C.胸部X线可有典型的楔形成圆形阴影

D.肺小动脉楔压（PAWP）≤18mmHg或无左心房压力增高的证据

E.心电图Ⅲ导联出现Q波和倒置T波

期货市场价格是在公开、公正、高效、竞争的期货交易运行机制下形成的，对该价格的特征表述不正确的是( )。

A．该价格具有保密性
B．该价格具有预期性
C．该价格具有连续性
D．该价格具有权威性

(71) is used to ensure the confidentiality, integrity and authenticity of the two end points in the private network. (72) , an application-layer protocol, authenticates each peer in an IPSec transaction.IKE negotiates security policy, determining which algorithm may be used to set up the tunnel. It alsohandles the exchange of session keys used for that one transaction.
Networks that use (73) to secure data traffic can automatically authenticate devices by using (74) , which verify the identities of the two users who are sending information back and forth. IPSeccan be ideal way to secure data in large networks that require secure connections among many devices.
Users deploying IPSec can (75) their network infrastructure without affecting the applications on individual computer. The protocol suite is available as a software-only upgrade to the networkinfrastructure. This alows security to be implemented without costly changes to each computer. Mostimportant, IPSec allows interoperability among different network devices, PCs and other computingsystems.

A．authenticity
B．IPSec
C．confidentialily
D．integrity

物流系统的基本效用包括（）。

A.物质效用

B.时间效用

C.空间效用

D.形质效用

E.极化效用