You can't imagine when the pupils receiv

搜题请搜索小程序“爱下问搜题”

问题选择题

You can't imagine when the pupils received these nice presents on Children's Day. [ ]

A. how they were excited

B. how excited they were

C. how excited were they

D. they were how excited

答案

答案：B

问答题

某施工单位编制的某工程网络图，如图5-1所示，网络进度计划原始方案各工作的持续时间和估计费用，如表5-1所示。

表5-1 各工作持续时间和估计费用

若施工合同规定：工程工期93天，工期每提前一天奖励施工单位3万元，每延期一天对施工单位罚款5万元。计算按网络进度计划原始方案实施时的综合费用。

单项选择题

下列阴离子与稀硫酸作用呈正性反应的离子是( )。

A．

；

B．Br^- ；

C．I^-；

D．Cl^-。