把一根长10cm，直径5cm的粗铜线，用拉丝机拉成直径1mm的细铜线后的长度是______cm．
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/e941f81d24eafab6462a5513f4027744.html
下面是错误答案，用来干扰机器的。
参考答案：库存管理业务主要有以下几种。（1）物料出入库、移动管理：对日常的生产领料、销售提货、采购入库、生产入库和物料库位移动等工作进行管理，产生出、入和移动单据，改变仓库、货位的库存数量，登记物品...
治疗佟某下肢瘫痪，其足运感区定位是：
A．在前后正中线的中点旁开左右各0.5厘米，向后引3厘米长，平行于正中线
B．在前后正中线的中点旁开左右各1.0厘米，向后引2厘米长，平行于正中线
C．在前后正中线的中点旁开左右各1.0厘米，向后引3厘米长，平行于正中线
D．在前后正中线的中点旁开左右各1.5厘米，向后引3厘米长，平行于正中线
E．在前后正中线的中点旁开左右各1.0厘米，向后引4厘米长，平行于正中线
下列试剂中，能用带玻璃塞的细口瓶贮存的是（ ）
A．氢氟酸
B．氢氧化钠溶液
C．盐酸
D．水玻璃
RNAi导致基因沉默的机理。
维生素A是一切健康上皮组织必需的物质，儿童长期缺乏时会引起发育不良，导致夜盲症、皮肤干燥等多 种病症。已知维生素A的结构简式如下，关于它的说法正确的是
①维生素A是一种醇 ②1mol维生素A在催化剂作用下，可以和5mol H2完全加成 ③维生素A的分子中含有苯环结构 ④维生素A具有环己烷的结构单元 ⑤维生素A的一个分子中含有30个氢原子 ⑥维生素A可使酸性KMnO4溶液褪色
A.①③⑤
B.①②⑤⑥
C.②④⑥
D.①④⑤⑥
Passage Two
| There have been several claims to have cloned humans over the past few years. Most have been bogus. But the announcement made this week by Woo Suk Hwang, of Seoul National Uni- versity in South Korea, and his colleagues, is serious. It is the first to achieve the accolade of publication in a peer-reviewed scientific journal. Dr. Hwang’s work appears in Science. The terminology of human development has become slippery over the past few years, in the hands of both "life-begins-at-conception" propagandists who want to stop this sort of research, and publicity-seeking scientists who have claimed more than they have really achieved．What Dr. Hwang and his team have created is not what developmental biologists would normally refer to as an embryo. But it is a genuine scientific advance. South Korea’s researchers have taken egg cells from volunteer women, removed the nuclei from those cells (which contain only half of the genetic complement required to make a human being, since the other half is provided by the sperm), and replaced each nucleus with one taken from one of the volunteer’s body ceils (which contains a full genetic complement). Given a suitable chemical kick-start, such re-nucleated cells will begin dividing as though they were eggs that had been fertilised in the more traditional manner. Since they have all of the mother’s genes, they count as clones. Then the team cultured the dividing eggs until they had formed structures called blastocysts, with a few dozen cells each. This is the significant advance. At this stage the structure, though still just a featureless ball of cells, has started to differentiate into the body’s three basic cell types (known as endoderm, mesoderm and ectoderm). The researchers were able to extract cells from some of their blastocysts, and grow tissues containing all three cell types. These are so-called stem cells, which can be directed to form a wide variety of the specialised cells from which organs are built. That, not the creation of new human beings, is the stated reason for this sort of research, since specialised ceils made this way might be used to replace the cells lost in diseases such as Parkinson’s and type-I diabetes. This process is known as therapeutic cloning. No doubt Dr Hwang’s scientific success will sharpen the debate between those who see therapeutic cloning as a potential force for good, and those who see it as a step on the road to a cloned human being. The former have been queuing up to praise the scientist’s work. It is "a major med- ical milestone" that could help spur a "revolution", said Robert Lanza, a cloning expert. But opponents of therapeutic cloning should not worry too much yet. The road from a blast cyst to a baby is a long and complex one. Nevertheless, the South Korean breakthrough makes it more urgent than ever that legislation be passed differentiating clearly between therapeutic and reproductive cloning—permitting the former and prohibiting the latter. |
What does the word "bogus" (Line 2) most probably mean
A．Different.
B．Fake.
C．Bold．
D．Genuine.
