咳喘无力，少气短息，吐痰清稀，自汗，舌淡脉弱者，最宜诊断为A．肺气虚证B．心肺气虚证

As Oil Declines, So does America

More than 100 years ago, America’s first great economic (26) abroad was spearheaded by its giant oil companies, notably John D. Rockefeller’s Standard Oil Company. These companies (27) powerful beachheads in Mexico and Venezuela, and later in parts of Asia, North Africa and, of course, the Middle East. (28) they became ever more dependent on the extraction of oil in distant lands, American foreign policy began to be (29) around acquiring and protecting US oil concessions in major (30) areas.
With World War Ⅱ and the Cold War, oil and US national (31) became thoroughly intertwined. After all, the United States had prevailed over the Axis (32) in significant part because it possessed vast reserves of domestic petroleum, while Germany and Japan lacked them, depriving their forces of vital (33) supplies in the final years of the war. As it happened, though, the United States was using up its domestic (34) so rapidly that, even before World War Ⅱ was over, Washington (35) its attention to finding new overseas sources of crude oil that could be (36) under American control. As a result, Saudi Arabia, Kuwait and a host of other Middle Eastern producers would become key US oil suppliers (37) American military protection.
There can be (38) question that, for a time, American domination of world oil production would prove a potent source of economic and military power. (39) World War Ⅱ, an abundance of cheap US oil spurred the (40) of vast new industries, including civilian air travel, highway construction, a (41) of suburban housing and commerce, mechanized agriculture, and plastics.

A. focusedB. transferred C. turned D. distracted

Abundant oil also underlay the global expansion of the country’s (42) power, as the Pentagon defended the world while becoming one of the planet’s great oil guzzlers. Its global dominion came to (43) on an ever-expanding array of oil-powered ships, planes, tanks and missiles. As long as the Middle East—and especially Saudi Arabia—served essentially as an American gas station and oil (44) a cheap commodity, all this was relatively painless. That is why the use of military force has been a (45) of American foreign policy since 1987.

（10分）从铝土矿(主要成分是Al₂O₃，含SiO₂、Fe₂O₃、MgO等杂质)中提取氧化铝的两种工艺流程如下：

请回答下列问题：

（1）流程甲通入过量CO₂后生成沉淀F的离子反应方程式为______________________________________。

(2流程乙加入烧碱溶解SiO₂的化学反应方程式____________________。

(3)验证滤液B含Fe^3＋，可取少量滤液并加入________(填试剂名称)。

(4)滤液E、K中溶质的主要成分是________(填化学式)，写出该溶质的一种用途____________________。

(5)已知298 K时，Mg(OH)₂的溶度积常数K_sp＝5.6×10^－12，取适量的滤液B，加入一定量的烧碱至达到沉淀溶解平衡，测得pH＝12，则此温度下残留在溶液中的c(Mg^2＋)＝________________。

下列关于香港和澳门的叙述，正确的是[ ]

A．香港和澳门分别位于珠江口的南北两侧

B．香港由香港岛、九龙半岛和新界三部分及周围200多个岛屿组成

C．澳门由澳门岛、氹仔岛和路环岛组成

D．港澳地区是世界上人口密度最低的地区之一

我国在推进依法治国的同时，十分重视公民道德建设，也提出要以德治国。这是因为

①依法治国和以德治国相互联系、相互代替 ②道德的约束力比法律更权威，效力更高

③人们的道德水平提高了，有助于人们自觉守法 ④道德是法律的基础

A．①②

B．②④

C．③④

D．②③

有两路及以上进线的用户，如何计算最大需量？