动车组一般情况下不得通过半径小于（）的曲线，通过曲线半径为250m曲线时，限速15k

某排污口附近河段的平水期平均流量为138m³/s，其水域规模为( )。

A．大河

B．中河

C．小河

D．特大河

下列在性质上属于混合性投资的是（）。

A.购买优先股股票

B.购买国库券

C.购买重点建设债券

D.购买普通股股票

钢结构吊装前要做好（）技术准备工作。

A.所有的测量用具必须经过检测合格方可使用

B.起重工、电焊工要持证上岗，必要时还需进行现场培训

C.所有钢构件吊装前，要进行预检，发现制作误差及时处理

D.对基础进行严格的验收

E.复杂结构要做拼装台试拼，检验构件尺寸

商业欺诈：是指在市场交易、投资、服务过程中，通过虚构隐瞒事实、发布虚假信息、签订虚假合同以及夸大宣传等手段，误导、欺骗单位和个人，骗取钱财和各种物质利益，破坏市场经济秩序，损害人民群众合法权益的行为，是违背诚实信用原则，以牟取利益为目的，以欺骗为手段的不正当竞争行为。
下列行为属于商业欺诈的是：

A．许多房产中介公司员工依据消费者心理，故意隐瞒身份，以个人身份随意发布租房售房信息来吸引客源
B．某公司注册了某名牌化妆品类似的商标生产化妆品进行销售，很多人都误认为是名牌产品而进行购买，购回后才发现上当受骗
C．某旅行社推出超低价国外游，吸引了很多人报名，共收到游客出国押金600多万元，负责该项目的导游偷偷携款潜逃
D．某通讯股份有限公司通过信函形式，虚构中奖信息，声称收件人中奖，奖品一般是手机、电脑等，需要缴纳个人所得税数百元不等。事实上，经查证，该公司未经工商部门注册登记

Questions 10—11 are based on the following:
Antinuclear activist: The closing of the nuclear power plant is a victory for the antinuclear cause. It also represents a belated acknowledgment by the power industry that they cannot operate such plants safely.
Nuclear power plant manager: It represents no such thing. The availability of cheap power from nonnuclear sources, together with the cost of mandated safety inspections and safety repairs, made continued operation uneconomic. Thus it was not safety considerations but economic considerations that dictated the plant’s closing.

Which one of the following, if true, most ply supports the activist’s claim of victory

A．The plant had reached the age at which its operating license expired.

B．The mandate for inspections and repairs mentioned by the manager was recently enacted as a result of pressure from antinuclear groups.

C．The plant would not have closed if cheap power from nonnuclear sources had not been available.

D．Per unit of electricity produced, the plant had the highest operating costs of any nuclear power plant.

E．(E) The plant that closed had been able to provide backup power to an electrical network then parts of the network became overloaded.