biospecifics生物股票市值
『壹』 BSTC是數字貨幣嗎哪家公司發行的
BSTC是美國百仕通集團發行的虛擬數字貨幣，給有一個黑鑽幣我是百仕通集團發行的，BSBC我是百仕通集團的，百事通集團是07年在納斯達克上市公司，全球最大的資金管理公司
『貳』 托福閱讀背景知識：地球最早是怎麼產生生物
托福真題再現：
版本一
1，地球早起大氣成分及生物 早起甲烷與二氧化碳佔主要地位，沒有氧氣。因為有了會光合作用的細菌，產生了大量氧氣，消耗二氧化碳，提供臭氧層，為當今新生物鍾提供必要環境。
版本二
有一個講地球最早怎麼產生生物的
大概有幾點，首先是太陽當時不夠熱，地球當時氣體組成像火山的，主要靠兩種氣體加溫度，似乎一種是二氧化碳另一種是m開頭的不認識
那種氣體組成不適合生命也沒什麼氧，當時的organism有很大作用，進行光合作用產生氧氣吸收二氧化碳，二氧化碳還有一部分被轉移成非氣態的，這樣就形成了後來的大氣組成
氧氣可以形成臭氧層，保護生物不受紫外線輻射，這塊提到了火星等其他星球就沒有臭氧層或者臭氧不夠多blabla不記得了，反正當時生物都去海里了因為水可以吸收紫外線輻射保護它們
威學一百解析：本文屬於生命起源類型，是托福閱讀資歷很老的話題之一，寫作角度涉及到巴斯德實驗、生命起源的幾種假說，以及過程的描述，同學在閱讀中的難點是要克服對生僻詞彙和背景知識的恐懼心理，這些都可以通過多讀和精讀來實現。
參考閱讀：
There is no truly "standard" model of the origin of life. But most currently accepted modelsbuild in one way or another upon a number of discoveries about the origin of molecular andcellular components for life, which are listed in a rough order of postulated emergence:
1. Plausible pre-biotic conditions result in the creation of certain basic small molecules(monomers) of life, such as amino acids. This was demonstrated in the Miller-Urey experimentby Stanley L. Miller and Harold C. Urey in 1953, although it is now generally held that theirlaboratory conditions did not reflect the original Earth's atmosphere.
2. Phospholipids (of an appropriate length) can spontaneously form lipid bilayers, a basiccomponent of the cell membrane.
3. The polymerization of nucleotides into random RNA molecules might have resulted inself-replicating ribozymes (RNA world hypothesis).
4. Selection pressures for catalytic efficiency and diversity result in ribozymes, whichcatalyse peptidyl transfer (hence formation of small proteins), since oligopeptides complexwith RNA to form better catalysts. Thus the first ribosome is born, and protein synthesisbecomes more prevalent.
5. Protein out-compete ribozymes in catalytic ability, and therefore become the dominantbiopolymer. Nucleic acids are restricted to predominantly genomic use.
There are many different hypotheses regarding the path that might have been taken fromsimple organic molecules to protocells and metabolism. Many models fall into the "genes-first"category or the "metabolism-first" category, but a recent trend is the emergence of hybridmodels.
The origin of the basic biomolecules, while not settled, is less controversial than thesignificance and order of steps 2 and 3. The basic chemicals from which life was thought to haveformed are commonly held to be methane (CH4), ammonia (NH3), water (H2O), hydrogensulfide (H2S), carbon dioxide (CO2) or carbon monoxide (CO), and phosphate (PO43-).Molecular oxygen (O2) and ozone (O3) typically are considered to have been either rare orabsent.
As of 2007, no one had yet synthesized a "protocell" using basic components that wouldhave the necessary properties of life (the so-called "bottom-up-approach"). Without such aproof-of-principle, explanations have tended to be short on specifics. However, someresearchers working in this field have argued that a "top-down approach" is more feasible.One such approach involves engineering existing prokaryotic cells with progressively fewergenes, attempting to discern at which point the most minimal requirements for life werereached. The biologist John Desmond Bernal coined the term biopoesis for this process, andsuggested that there were a number of clearly defined "stages" that could be recognized inexplaining the origin of life.
Stage 1: The origin of biological monomers
Stage 2: The origin of biological polymers
Stage 3: The evolution from molecules to cell
Bernal suggested that Darwinian evolution may have commenced early, some time betweenStage 1 and 2.
『叄』 wxb是哪家公司的數字貨幣
英為財情的數字貨幣行情庫已經涵蓋超過2500種虛擬幣，搜索bstc，無結果，說明並不存在這樣一種流行的數字貨幣。
不過，美股市場中，有一支股票的股票代碼是bstc，即biospecifics生物
(bstc)