工程量清单主要由( )等组成。A．分部分项工程量清单、措施项目清单 B．分部分项工

职业技能鉴定程序有哪些？

25℃时，在25 mL0.1 mol·L^-1的NaOH溶液中，逐滴加入0.2 mol·L^-1的CH₃COOH溶液，溶液的pH与醋酸体积关系如图，下列分析正确的是

A．B点的横坐标a=12.5

B．C点时溶液中有： c(Na⁺)>c(CH₃COO^-)>c(H⁺)>c(OH^-)

C．D点时溶液中有： c( CH₃COO^-)+c(CH₃COOH)=2c(Na⁺)

D．曲线上A、B间的任意一点，溶液中都有：c(CH₃COO^-)>c(Na⁺)＞c(OH^-)>c(H⁺)

有以下程序main(){int i,S=0,t[]={l,2,3,4,5,6,7,8,9}；for(i=0；i<9；i+=2)S+=*(t+i)；printf("％d＼n",S)；}程序执行后的输出结果是【 】。

A．45

B．20

C．25

D．36

We have already covered the topic of network addresses. The first  (1) in a block (in classes A, B, and C) defines the network address. In classes A, B, and C,if the hostid is all ls,the address is called a direct broadcast address. It is used by a(2) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a (3) address in an IP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B，and C． In classes A, B, and C, an address with all ls for the netid and hostid (32bits) define a (4) address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However, a router will block a packet having this type of address to confine the broadcasting to the (5) network. Note that this address belongs to class E.

空白（2）处应选择（）

A.router

B.switch

C.hub

D.firewall

下面关于证券自营业务说法正确的是（）。

A.证券公司均不得从事证券自营业务

B.证券公司均可以从事证券自营业务

C.证券公司只能从事由包销产生的证券自营业务

D.一部分证券公司可以从事证券自营业务