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【简答题】
A、B、C、D是短周期元素形成的四种气体单质，其它物质为化合物。H常作为普通锌锰干电池的电解质。有关的转化关系如下图所示（反应条件均已略去）。 请回答下列问题： （1）B的结构式为____ ，G的化学式为 。 （2）Y和E在一定条件下可反应生成B和Z，该反应的化学方程式为 。 （3）在体积为0.5L的恒容密闭容器中，充人1.25molB和1.25molD进行如下化学反应： B（g）+3D（g） 2Y（g），其化学平衡常数K与T的关系如下表所示： T/℃ 300 400 K 3.41 0.50 ①若反应在400℃下进行，下列各项中能作为判断该反应达到化学平衡状态依据的是 （填字母）。 A．Y、B、D的物质的量分别为0.50mol、l.0mol、0.50mol B．v 正 （B）=' 3v' 逆 （D） C．容器内压强保持不变 D．混合气体的密度保持不变 ②在一定条件下B（g）+3D（g） 2Y（g）达到平衡状态，时间为t 1 时改变条件。化学反应速率与反应时间的关系如图。下列说法中正确的是（ ） A．维持温度、反应体系体积不变，t 1 入Y（g） B．维持压强不变，t l 时升高反应体系温度 C．维持温度不变，t 1 时扩大反应体系体积 D．维持温度、压强不变，t 1 入Y（g） （4）0.lmol·L -1 的X溶液和0.2mol·L -1 的Y溶液等体积混合后显碱性，则该混合溶液中各离子浓度大小顺序是 ． （5）常温下，0.1mol·L -1 的Y溶液中 =l×10 -8 ，下列叙述中错误的是 （ ） A．该溶液的pH='11 ' B．该溶液中的溶质电离出的阳离子浓度为0.1mol·L -1 C．该溶液中水电离出的c（H + ）与c（OH — ）乘积为l×10 -22 D．pH=l的X溶液V 1 L与0.1mol·L -1 的Y溶液V 2 L混合，若混合溶液pH =7，则V 1 2 E．将0.1mol·L -1 的Y溶液加水稀释100倍后，pH >9
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【单选题】Which of the following is correct about venture capital?
A.
Venture capital is financing that investors provide to successful companies.
B.
Venture capital is financing that investors provide to startup companies.
C.
Venture capital is financing that investors provide to state-owned companies.
D.
Venture capital is financing that investors provide to small companies.
【多选题】以下关于文献说法正确的是
A.
一次文献是最基本信息源是最终的检索对象
B.
二次文献是对一次文献的集中提炼和有序化，是一次文献信息检索的工具
C.
三次文献是专门高度浓缩的文献信息，入目录、索引、文摘等。
D.
零次文献是未经出版发行或公开交流的最原始的记录
【单选题】Which city is the capital in Scotland?
A.
Cardiff
B.
Edinburgh
C.
Glasgow
D.
Manchester
【简答题】芳香烃的通式为( ),根据分子中所含苯环的数目可将芳烃分为( )、( )、( )。
【单选题】Which of the following is correct about venture capital?
A.
Venture capital is financing that investors provide to successful companies.
B.
Venture capital is financing that investors provide to startup companies (venture capital风投资本，课上讲过它的特征是风险大，收益大。主要是投资有潜力的刚起步的公司。所以这些被投资的公司最重要的特征不是小。有些公司经营了很久可还是小公司。因而Ｄ不对。)
C.
Venture capital is financing that investors provide to state-owned companies
D.
Venture capital is financing that investors provide to small companies
【单选题】Which of the following is a disadvantage of global capital market?
A.
A truly global market reduces the liquidity of investments.
B.
The availability of capital is low in a global capital market.
C.
Foreign investments may be driven by speculative flows in the market.
D.
The cost of capital is more in a global market than a domestic market.
【单选题】Which of the following statements about preference shares as a source of capital for a company is correct?
A.
Preference shares are a form of loan capital which carry lower risk than ordinary shares
B.
Preference shares are a form of equity capital which carry higher risk than ordinary shares
C.
Preference shares are a form of loan capital which carry higher risk than ordinary shares
D.
Preference shares are a form of equity capital which carry lower risk than ordinary shares
【单选题】Which of the following is the characteristic that distinguishes a capital lease from an operating lease?______.
A.
A capital lease is a long-term and noncancelable financing obligation that is a form. of debt.
B.
The capital lease transfers title of the leased asset to the lessee at the end of the lease term.
C.
The lease term of a capital lease is 75% or more of the estimated useful life of the leased asset.
D.
The present value of the lease payments is 90% or more of the market value of the leased asset.
E.
Each of the above.
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