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【简答题】
如图，半径为1的半圆内接等腰梯形，其下底是半圆的直径，试求： （1）它的周长y与腰长x之间的函数关系式，并求出自变量x的取值范围． （2）当腰长为，周长有最大值？这个最大值为多少？
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【简答题】与颜真卿并称“颜筋柳骨”的唐代著名书法家是（）。
【单选题】According to the authors understanding, what is Al Gores view on global warming?
A.
It is a reality both people and politicians are unaware of.
B.
It is a phenomenon that causes us many inconveniences.
C.
It is a problem that can be solved once it is recognized.
D.
It is an area we actually have little knowledge about.
【单选题】Gaining a global understanding is
A.
unimportant because the United States is so rich and there is little reason for us to learn about other nations.
B.
important for college students because most new U.S. jobs involve international trade.
C.
unimportant since there is no longer very much poverty in the world.
D.
important although people the world over have ways of life that are mostly the same.
【简答题】颜真卿是我国唐代著名书法家，下面属于颜真卿的作品是()。 A《胆巴碑》 B.《勤礼碑》 C.《玄秘塔碑》 D.《九成宫醴泉铭》
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