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Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi
Combination Hair 02混合性发质 02 用过洗发液之后,再用清洁型护发素。如同不能将洗发液直接用于发梢上一样,你也千万不要把护发素直接涂抹于头皮上。护发素里的滋润因子会使头皮产生更多的油质。相反,你应该把护发素集中使用在发梢上,然后用凉水彻底将护发素冲洗干
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Electronics come in all shapes and sizesbut theres been a limit on their flexibility. Now, researchers say theyve created electronics that can be shape
Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of
考试大纲规定,考生们除了掌握考试大纲规定的5500个基本词汇以外,还应掌握词汇之间的词义关系,如同义词、近义词、反义词等。因此,考生在复习单词时,不仅要记词更要学会去辨析,尤