一定量的锌与100mL18.5mol•L-1的浓H2SO4充分反应后,锌完全溶解

题型:选择题

问题:

一定量的锌与100mL18.5mol•L-1的浓H2SO4充分反应后,锌完全溶解,同时生成标准状况下的气体33.6L.将反应后的溶液稀释至1L,测得溶液中c(H+)=0.1mol•L-1.则生成的气体中SO2和H2的体积比为(  )

A.1:2

B.2:1

C.1:4

D.4:1

考点:化学反应方程式
题型:选择题

属于辨证取穴的是

A.鼻病取迎香
B.胃痛取中脘
C.痰邪取丰隆
D.失眠取神门
E.腰痛取委中

题型:选择题

两个或者两个以上房地产经纪机构就同一宗房地产经纪业务开展合作的,收费按()。

A.两宗业务分别收取

B.两宗业务收取,但收费额不能高于一宗业务的两倍

C.一宗业务收取,但收费额可高于一宗业务

D.一宗业务收取

题型:选择题

折扣与让价策略中()是对一次付清货款的顾客给予的让价。

A.现金折扣

B.数量折扣

C.功能折扣

D.季节折扣

题型:选择题

With hundreds of millions of electronic transactions taking place daily, businesses and organizations have a p incentive to protect the (66) of the data exchanged in this manner, and to positively ensure the identities of those involved in the (67) . This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying p security (68) deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security. (69) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (70) and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

A.documents

B.chips

C.appliances

D.means

题型:选择题

冒泡排序算法在最好的情况下的元素交换次数为______。

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