铁铬系变换催化剂的主要成分是三氧化二铁,要把它还原成活性铁才具有活性。()
参考答案:错
With only about 1000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species. That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called "Noah’s Ark". Noah’s Ark is aimed at collecting eggs, embryos, semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future. It is estimated that as many as 2000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years. This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to complete. "The nuclear transfer of one species to another is not easy, and the lack of available (capable of being used) panda eggs could be a major problem, " Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort, " adds Kraemer, who is one of the leaders of the Project at Texas A & M, the first-ever attempt at cloning a dog. "They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed. \
The aim of "Noah’s Ark" project is to ______.
A. make efforts to clone the endangered pandasB. save endangered animals from dying outC. collect DNA of endangered animals to studyD. transfer the nuclear of one animal to another
某工程项目建设单位通过公开招标方式确定某施工单位为中标人,双方签订了工程承包合同,合同工期3个月。
合同中有关工程价款及其支付的条款如下:
1.分项工程清单中含有2个分项工程,工程量分别为甲项4500m3,乙项31000m3,清单报价中,甲项综合单价为200元/m3,乙项综合单价为12.93元/m3,乙项综合单价的单价分析表如下表所示。当某一分项工程实际工程量比清单工程量增加超出10%时,应调整单价,超出部分的单价调整系数为0.9;当某一分项工程实际工程量比清单工程量减少10%以上时,对该分项工程的全部工程量调整单价,单价调整系数为1.1,见表7—2。
2.措施项目清单共有7个项目,其中环境保护等3项措施费用4.5万元,这3项措施费用以分部分项工程量清单计价合计为基数进行结算。剩余的4项措施费用共计16万元,一次性包死,不得调价。全部措施项目费在开工后的第1个月末和第2个月末按措施项目清单中的数额分2次平均支付,环境保护措施等3项费用调整部分在最后一个月结清,多退少补。
3.其他项目清单中只包括招标人预留金5万元,实际施工中用于处理变更洽商,最后一个月结算。
4.规费综合费率为4.89%,其取费基数为分部分项工程量清单计价合计、措施项目清单计价合计、其他项目清单计价合计之和;税金的税率为3.47%。
5.工程预付款为签约合同价款的10%,在开工前支付,开工后的前2个月平均扣除。
6.该项工程的质量保证金为签约合同价款的3%,自第1个月起,从承包商的进度款中按3%的比例扣留。
合同工期内,承包商每月实际完成并经工程师签证确认的工程量见表7-3。
问题
各月的分部分项工程量清单计价合计是多少万元,并对计算过程做必要的说明。