自然界地表层原生铜的硫化物经氧化、淋滤作用后变成CuSO4溶液,向地下深层渗透,

题型:选择题

问题:

自然界地表层原生铜的硫化物经氧化、淋滤作用后变成CuSO4溶液,向地下深层渗透,遇到难溶的ZnS或PbS,慢慢转变为铜蓝(CuS)。下列分析正确的是  [ ]

A. CuS的溶解度大于PbS的溶解度

B. 原生铜的硫化物具有还原性,而铜蓝没有还原性

C. CuSO4与ZnS反应的离子方程式是Cu2++S2-==CuS↓

D. 整个过程涉及的反应类型有氧化还原反应和复分解反应

考点:沉淀溶解平衡氧化还原反应的定义复分解反应
题型:选择题

( )回购协议实质上是资金余缺双方的一种证券的借贷交易。

A.抵押

B.买卖

C.借贷

D.贴现

题型:选择题

使企业银行存款日记账的余额小于银行对账单余额的未达账项有()。

A.企业已收款记账而银行尚未收款记账

B.企业已收款记账而银行尚未收款记账

C.银行已收款记账而企业尚未收款记账

D.银行已付款记账而企业尚未付款记账

题型:选择题

Turkey’s Bodrum peninsula is different. The tourist boom in this part of the world (1) turned some small villages into resorts yet left neighbouring beaches undisturbed, making it quite (2) southern France or the Spanish Coasts where few stretches of coastline are undevelopeD.
The (3) for this happy set of circumstances is simple. For thousands of years, travel here (4) easier by boat than by lanD.So when mass tourism arrived in the (5) 1980s, there was no coast road for ribbon development to follow. So the peninsula, just (6) hour from Bodrum airport, has not become one long littoral of resort.
The building (7) new hotels has mainly been confined to places easily reached by then relatively (8) roads. Such ease of access has made Gumbet, near Bodrum, a busy resort, while the little fishing village of Gumusluk, 12 miles further west and only recently reachable by (9) , remains tranquil and undisturbeD.
It’s worth thinking carefully about location when planning a family (10) on the peninsulA.Choose a place that is centrally located, preferably out of earshot (11) Bodrum town’s "lively"—which means nosy—nightlife, and you can then use (12) area’s comfortably small scale to your advantage. Today’s new roads mean most places can (13) reached in under an hour by taxi or the ubiquitous dolmus-minibus.
The (14) of facilities at the Tamarisk Beach Hotel near the small village of Ortakent makes (15) a good base. The family-run hotel—rooms and suites are in two-storey buildings (16) by palm trees and flowers in terracotta pots—sits above its own sandy (17) beach, shaded by tamarisk trees and sheltered by nearby islands.
The hotel is (18) child-friendly, too. Children, from infants up to young teenagers, can take part in a (19) of games and activities that include tuition in windsurfing, dinghy (20) catamaran sailing.

"The body and the mind are inextricably interwoven" means______.

A.they interact with each other

B.they are confused by all of us

C.they have little effect on each other

D.they are mixed up in all of us

题型:选择题

下列选项中,( )是航空货运单的作用。

A.代表运单项下货物的所有权

B.证明航空承运人接受了货物

C.证明航空承运人收到货物的重量、尺寸、包装、件数等

D.证明托运人与承运人已签订国际航空货物运输合同

题型:选择题

在Dreamweave中,下面关于调用Photoshop优化图象的说法错误的是:()

A.Photoshop主要用于网页图象的制作

B.在Dreamweave中可以直接调用Photoshop的网页图象优化功能

C.Photoshop提供了优化的压缩算法来实现多种图象格式化的互相转换

D.提供与Dreamweave相结合的网页图象优化功能,但不会降低了网页中的图象文件的数据量

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