以一酰甘油途径合成三酰甘油主要存在于（） A.脂肪细胞 B.肠黏膜细胞 C.肝细胞 发布时间：2017-06-07 03:02 │ 来源：www.tikuol.com 题型：单项选择题 问题： 以一酰甘油途径合成三酰甘油主要存在于（）A.脂肪细胞B.肠黏膜细胞C.肝细胞D.肌细胞E.肾脏细胞
题型：单项选择题 已知在相同状况下，同一化学键断裂需要吸收的能量等于形成该化学键放出的能量。下列说法错误的是 [ ]A．电解熔融的Al2O3可以制得金属铝和氧气，该反应是一个放出能量的反应 B．H2(g)+F2(g)=2HF(g) △H=-270 kJ/mol ，1个氢气分子与1个氟气分子反应生成2个氟化氢气体分子放出270 kJ热量 C．相同状况下，反应2SO2+O2＝2SO3是一个放热反应，则反应2SO3＝2SO2+O2是一个吸热反应 D．破坏1 mol氢气中的化学键消耗的能量为Q1 kJ，破坏1 mol氯气中的化学键消耗的能量为Q2 kJ，形成1 mol氯化氢中的化学键释放的能量为Q3 kJ，则Q1+Q2＜2Q3 查看答案
题型：单项选择题 Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boys’ two. The general incidence of colds continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is found among people in their twenties, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections. The study also found that economics plays an important role. As income increases, the frequency at which colds are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the upper end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.The paragraph before this passage most probably deals with ______ .A．minor diseases other than coldsB．the recommended treatment of coldsC．a factor that affects susceptibility to coldsD．methods of preventing colds among elderly people 查看答案