half-life 1.A substance which undergoes exponential decay decays by the same ratio in equal intervals of time. The constant ratio is the half-life. The rate of radioactive decay of a substance is defined by its half-life. 2.The time in which half the atoms in a radioactive isotope deca...
Move on, for life is not meant tobe traveled backwards. 不要浪费时间追忆失去的东西。你得朝前看,因为生命不会走回头路。 Believe you can and you're halfway there. 相信自己,你已经成功了一半。—— Theodore Roosevelt 赞 回复 aaron (曾为你神往,亦要落堂。) 楼主 2013-03-02 18:11:25 最...
根据前句The only constant (不变) in life is change.以及后句Technology is out of date almost by the time you buy it. We get plenty of information every day. 可知,这里是说生活在多变的世界里,故选D。【小题2】句意:那是因为我们的大脑想保护我们。根据前句Why are we afraid of change?可知...
it blows it brings constant re it called big boss it came down to the a it came upon a midnig it can be seen under it can happen to it can not be apparen it can not happen tha it can take years it cannot waitim your it cant be helped it cant be love if yo it chief it com...
im gonna take you hig im gonna try these on im gonna wrap you up im got a new computer im half a party in a im having more illusi im his brother im his friend im in a good mood im in love im so in l im in love with a fai im in the front seato im in the tent im in...
Decay Constant:In nuclear physics, the systemic decay of radioactive substances is modelled according to two parameters called the half-life of the material and the decay constant. The properties are unique for different radioactive elements.
it does not decrease at a constant (linear) rate, but at an ever-decreasing rate that depends upon the amount of material remaining. Materials that decompose in this way are said to have a 'half-life'. That doesn't mean that they exist in some weird pseudo-reality. What it does mean...
(1)D.根据前句"Theonlyconstant(不变)inlifeischange."可知说的是变化的世界,结合选项,应说我们生活在一个每时每刻都在变化的世界.故选D.(2)B.根据前句"Whyareweafraidofchange?"可知这里应说害怕改变的原因,结合选项,应说这是因为我们的大脑想要保护我们.故选B.(3)F.根据前句"Afterall,whoknowswhat...
aPerhaps the life process is a constant, and give up constantly process. - - - giving up, not timid, not humbled themselves, also not cynicism, but made after a mounted sensible choice. 或许生活过程是常数,并且经常放弃过程。 -- -放弃,不怯懦,没贬低自己,也不是愤世嫉俗,而且在一个登上的...
解析 The on-ly constant(不变)in life is change;我们生活在时刻变化的世界;B;B 结果一 题目 【题目】“The only constant(不变) in life is change," Heraclitus said in about 500B. C. That could be more true today.Technology is out of date al-mot by the time you buy t. We get plent...