回收物流合理化的意义不在于（）A、节约资源B、提高竞争力C、经济效益D、保护环境

某工程项目施工合同价为560万元，合同工期为6个月，施工合同规定如下。
1．开工前业主向施工单位支付合同价20%的预付款。
2．业主自第1个月起，从施工单位的应得工程款中按10%的比例扣保留金，保留金限额暂定价的5%，保留金到第3个月底全部扣完。
3．预付款在最后两个月扣除，每月扣50%。
4．工程进度款按月结算，不考虑调价。
5．业主供料价款在发生当月的工程款中扣回。
6．若施工单位每月实际完成的产值不足计划产值的90%时，业主可按实际完成产值的8%的比例扣留工程进度款。工程竣工结算时实际完成的产值见表6-10。
7．经业主签订的施工进度计划和实际完成产值见表6-10。
表6-10

进度计划与产值数据表

(单位：万元)

时间/月	1	2	3	4	5	6
计划完成产值	70	90	110	110	100	80
实际完成产值	70	80	120
业主供料价款	8	12	15

该工程施工进入第4个月时，由于业主资金出现困难，合同被迫终止。为此，施工单位提出以下费用赔偿要求：
(1)施工现场存有为本工程购买的特殊工程材料，计50万元；
(2)因设备撤回基地发生的费用10万元；
(3)人员遣返费用8万元。
问题：
1．该工程的工程预付款是多少万元应扣留的保留金为多少万元
2．第1个月到第3个月各月签证的工程款是多少应签发的付款凭证金额是多少万元
3．合同终止时业主已支付施工单位各类工程款多少万元
4．合同终止时施工单位提出的补偿要求是否合理业主应补偿多少万元
5．合同终止后业主应向施工单位共支付多少万元的工程款

我国证券市场上出现的交易型开放式指数基金代表的是一揽子股票的投资组合，追踪的是( )。

A．实际股票价格
B．实际的股价指数
C．投资组合总市值
D．上证50指数

圆柱、棱柱的截面都可能是______．

A growing number of students in the United States are studying Mandarin(普通话). It is the official language of China. More and more people speak Mandarin than those who speak other languages in the world.

Schools that teach Mandarin want to prepare students for a future in which they are likely to work with people from China. Business in China is booming(繁荣的), and that trend(趋势) is expected to grow.

The US government is trying to encourage even more public schools to teach Mandarin. Officials are considering spending about $1 billion on Mandarin programs in schools. China is getting involved(参与) too. The Chinese government has donated Mandarin textbooks to US schools. Some schools are also taking part in teacher exchange programs with China.

“It is important for students to learn Mandarin and Chinese culture,” said Mary Patterson, a school principal(校长) in Portland, Oregon. “Students who do so will have wider opportunities when they become adults.”

小题1:Why are US schools teaching Mandarin?

A．To help students communicate with Chinese students.

B．To encourage students to move to China,

C．To prepare students for the future.

D．To get students interested in business.小题2:The underlined word “donated” (in Paragraph 4) can be replaced by “______”?

A．provided

B．kept

C．made

D．found小题3: What is the best title for this passage?

A．Why US students learn Mandarin

B．Schools in China

C．How to speak Mandarin

D．China today

转发邮件时，在阅读邮件窗体工具栏上，单击“转发”后，在“收件人”框中（）。

A.手动输入要将邮件转发到的电子邮件地址

B.自动填入要将邮件转发到的电子邮件地址

C.自动填入所有联系人的地址

D.自动填入原始邮件的发件人地址