若三角形的三个内角的比是1：2：3，最短边长为1cm，最长边长为2cm，则这个三

----Do you think the weather is good for an outing?

-----Yes,you couldn’t hope for________at the time of the year.

A．the nicer day

B．a nicer day

C．the nicest day

D．a nice day

下列有关溶液的说法符合实际的是 （    ）

A．将澄清的饱和石灰水加热，无白色浑浊出现

B．20℃时氯化钠溶解度是36g，将30g氯化钠放入50g水中充分搅拌，得到80g溶液

C．硫酸溶液中存在的阳离子全部是H⁺

D．溶液一定是无色透明的液体

有人把一块美玉献给子罕,子罕不受。献玉者说:“我把玉给工匠看了,他们认为是宝物,所以才献给你。”子罕回答:“你把玉当作宝,我把不贪当作宝。你把玉给我,那么你失去了玉,我失去了不贪的德,大家都失去了自己的宝物。不如我们各自保有自己的宝物。”子罕拒玉的历史典故包含的哲学道理有①事物的价值是变化的,因为其属性和功能具有不确定性②事物是否具有价值,取决于人们的价值判断③人们的立场和需要不同,其价值选择就不同④价值观对人的行为起着重要的导向作用

A．①②

B．①③

C．②④

D．③④

C

In the 1920s demand for American farm products fell, as European countries began to recover from World War I and started austerity （紧缩） programs to reduce their imports．The result was a sharp drop in farm prices．This period was more disastrous for farmers than earlier times had been, because farmers were no longer self-sufficient．They were paying for machinery, seed, and fertilizer, and they were also buying consumer goods．The prices of the items farmers bought remained constant, while prices they received for their products fell．These developments were made worse by the Great Depression, which began in 1929 and extended throughout the 1939s．

In 1929, under President Herbert Hoover, the Federal Farm Board was organized．It established the principle of direct interference （干预） with supply and demand, and it represented the first national commitment to provide greater economic stability for farmers．

President Hoover's successor attached even more importance to this problem．One of the first measures proposed by President FranklinD．Roosevelt when he took office in 1933 was the Agricultural Adjustment Act, which was later passed by Congress．This law gave the Secretary of Agriculture the power to reduce production through voluntary agreements with farmers who were paid to take their land out of use．A deliberate shortage of farm products was planned in an effort to raise prices．This law was declared unconstitutional （违背宪法的） by the Supreme Court on the grounds that general taxes were being collected to pay one special group of people．However, new laws were passed immediately that achieved the same result of resting soil and providing flood-control measures, but which were based on the principle of soil conservation．The Roosevelt Administration believed that rebuilding the nation’s soil was in the national interest and was not simply a plan to help farmers at the expense of other citizens．Later the government guaranteed loans to farmers so that they could buy farm machinery, hybrid （杂交） grain, and fertilizers．

53．What caused the problem in the demand for American farm products?

A．The effect of the Great Depression．

B．The shrinking of overseas markets．

C．The destruction caused by the First World War．

D．The increased exports of European countries．

54．The word “successor” refers to ______．

A．President Hoover           B．US Secretary of State

C．President Franklin          D．US Secretary of Agriculture

55．The Agricultural Adjustment Act encouraged American farmers to ______．

A．reduce their scale of production        B．make full use of their land

C．adjust the prices of their farm products  D．be self-sufficient in agricultural production

56．The Supreme Court rejected the Agricultural Adjustment Act because it believed that the Act ______．

A．might cause greater shortage of farm products

B．didn't give the Secretary of Agriculture enough power

C．would benefit neither the government nor the farmers

D．benefited one group of citizens at the expense of others

炉温高时，煤气膨胀，体积增大，易造成悬料：在炉温低时，煤气体积小，即使悬料也不是炉温低的原因。