在我国房地产市场，新建商品房的经纪活动主要采取( )方式。 A．居间 B．代理

今天人们仍然能够享受到的，与恩格斯领导第二国际的斗争有着历史联系的是

①农村土地集体所有制度        ②五一节公共假日    

③国家公职人员工资制度        ④八小时工作制

A．①②　

B．①③

C．①④

D．②④

某建设项目的进口设备采用CFR交货价，则买方的责任有（）。

A.负责租船并将设备装上船只

B.支付运费、保险费

C.承担设备装船后的一切风险

D.办理在目的港的清关手续

E.办理出口手续

以下可以得到“2*5=10”结果的 VBA 表达式为______。

A．"2*5" & "=" & 2*5

B．"2*5" + "=" + 2*5

C．2*5 & "=" & 2*5

D．2*5 + "=" + 2*5

Any normal species would be delighted at the prospect of cloning. No more nasty surprises like sickle cell or Down syndrome--just batch after batch of high-grade and, genetically speaking, immortal offspring! But representatives of the human species are responding as if someone had proposed adding Satanism to the grade-school Curriculum. Suddenly, perfectly secular folks are throwing around words like sanctity and retrieving medieval-era arguments against the pride of science. No one has proposed burning him at the stake, but the poor fellow who induced a human embryo to double itself has virtually recanted proclaiming his reverence for human life in a voice, this magazine reported," choking with emotion."

There is an element of hypocrisy to much of the anti-cloning furor, or if not hypocrisy, superstition. The fact is we are already well down the path leading to genetic manipulation of the creepiest sort. Life-forms can be patented, which means they can be bought and sold and potentially traded on the commodities markets. Human embryos are life-forms, and there is nothing to stop anyone from marketing them now, on the same shelf with the Cabbage Patch dolls.

In fact, any culture that encourages in vitro fertilization has no right to complain about a market in embryos. The assumption behind the in vitro industry is that some people’s genetic material is worth more than others’ and deserves to be reproduced at any expense. Millions of low-income babies die every year from preventable ills like dysentery, while heroic efforts go into maintaining yuppie zygotes in test tubes at the unicellular stage. This is the dread "nightmare” of eugenics in familiar, marketplace form which involves breeding the best-paid instead of the best. Cloning technology is an almost inevitable byproduct of in vitro fertilization. Once you decide to go to the trouble of in vitro, with its potentially hazardous megadoses of hormones for the female partner and various indignities for the male, you might as well make a few backup copies of any viable embryo that’s produced. And once you’ve got the backup organ copies, why not keep a few in the freezer, in case Junior ever needs a new kidney or cornea

The critics of cloning say we should know what we’re getting into, with all its Orwellian implications. But if we decide to outlaw cloning, we should understand the implications of that. We would be saying in effect that we prefer to leave genetic destiny to the crap shooting of nature, despite sickle-cell anemia and Tay-Sachs and all the rest, because ultimately we don’t trust the market to regulate life itself. And this may be the hardest thing of all to acknowledge: that it isn’t so much 21st century technology we fear, as what will happen to that technology in the hands of old-fashioned 20th century capitalism.

It is implied in the 3rd paragraph that it is（）

A. dishonest to deny some genetic manipulations

B. impractical to change our genetic destiny

C.dangerous to prepare backup copies

D. irrational to oppose financial operations

工件六个自由度完全限制称为（），按加工要求应限制的自由度没有被限制的定位称为欠定位，夹具上的两个或两个以上的定位元件重复约束同一个自由度的现象，称为（）。