【简答题】The most common causes of stress in family life are finances, work and health. The financial situation is the cause most often cited for stress in family life. When there are money problems, people 1 ...
【单选题】When people are unemployed, two major sources of stress come into play. One is the loss of income, with all the financial hardships that this brings. Suddenly there are the difficulties of paying the ...
A.
to inform readers about the major sources of stress for the unemployed.
B.
to persuade readers that unemployment should be eliminated.
C.
to amuse readers with observations about human nature.
【简答题】【有机物化学基础】 某有机物X的相对分子质量小于100,取1 mol有机物X在O 2 中完全燃烧生成等物质的量的CO 2 和H 2 O,同时消耗标准状况下的O 2 112 L。 (1)该有机物X的分子式为________(填序号)。 A C 4 H 8 B C 2 H 4 O C C 4 H 8 O 2 D C 10 H 20 O 20 (2)甲物质是X的同分异构体,分子中含有羰基和...
【简答题】某有机物X的相对分子质量小于100,取1 mol有机物X在O 2 中完全燃烧生成等物质的量的CO 2 和H 2 O,同时消耗标准状况下的O 2 112 L。 (1)该有机物X的分子式为________(填序号)。 a.C 4 H 8 b.C 2 H 4 O c.C 4 H 8 O 2 d.C 10 H 20 O 20 (2)甲物质是X的同分异构体,分子中含有羰基和羟基,甲物质能发生如图...