[单项选择] Our multimillion nerve-cell central nervous system has its roots in the scattered nerve cells of tiny, lowly organisms that lived in water half a billion years ago. Nerve cells evidently first appeared in coelenterates —"hollow-gutted" organisms like hydra and the sea anemone. A coelenterate’’s nerve network lacks any kind of centralized control. This probably began with flatworms — the first creatures to possess a head, specialized sense cells help flatworms respond more flexibly than sea anemones to outside stimulus. But like most animals without a backbone, flatworms act mostly by instinct and reflex. Intelligent behavior remained impossible until the appearance of relatively big, complex types of brain — the types we find among the backboned animals, or vertebrates. The tiniest fish has a larger brain than the largest insect. But the development of a fish’’s three-part brain reflects that beast’’s unin-tellectual priorities. Much of the forebrain deals only with smell. Th
A. The sensory organs of invertebrates.
B. The anatomy of tiny organisms.
C. The origin of the brain and central nervous system.
D. The importance of vision for fish and advanced mammals.

[单项选择] Our multimillion nerve-cell central nervous system has its roots in the scattered nerve cells of tiny, lowly organisms that lived in water half a billion years ago. Nerve cells evidently first appeared in coelenterates —"hollow-gutted" organisms like hydra and the sea anemone. A coelenterate’’s nerve network lacks any kind of centralized control. This probably began with flatworms — the first creatures to possess a head, specialized sense cells help flatworms respond more flexibly than sea anemones to outside stimulus. But like most animals without a backbone, flatworms act mostly by instinct and reflex. Intelligent behavior remained impossible until the appearance of relatively big, complex types of brain — the types we find among the backboned animals, or vertebrates. The tiniest fish has a larger brain than the largest insect. But the development of a fish’’s three-part brain reflects that beast’’s unin-tellectual priorities. Much of the forebrain deals only with smell. Th
A. flatworm
B. coelenterate
C. sea anemone
D. nerve cell

[单项选择]The nervous system consists of a great number of nerves, which like the blood vessels extend to all parts of the body（）
A. 神经系统由大量的神经组成，这些神经像血管一样分布到全身的各个部分。
B. 神经系统由一些神经组成，这些神经和血管都通向全身各个部分。
C. 神经系统包括一些神经，与血管一样，它们遍布全身各部分。
D. 神经系统由许多像血管一样的神经组成，它们分布于全身各部分。

[单项选择]Federal Reserve System, central banking system of the United States, popularly called the Fed, is a central bank that serves as the banker to both the banking community and the government；it also issues the national currency, conducts monetary policy, and plays a major role in supervision and regulation of banks and bank holding companies．In the U.S.these functions are the responsibilities of key officials of the Federal Reserve System：the Board of Governors located in Washington, D.C., and the top officers of the 12 district Federal Reserve banks, located throughout the nation．The Fed’s actions, described below, generally have a significant effect on the U.S.interest rates and, subsequently, on stock, bond, and other financial markets．
The Federal Reserve’s basic powers are concentrated in the Board of Governors, which is paramount(极为重要的)in all policy issues concerning bank regulation and supervision and in most aspects of monetary control. The board enunciates(阐明) the Fed’s p
A. functions as China’s Banks
B. is the counterpart of the People’s Bank of China
C. is subject to the banking Community and government
D. has 12 top officers who can influence the American financial market

[单项选择]A. Thinking is a function of nervous system.
B. Thinking is solely a brain function.
C. Thinking is the sum total of bodily activity.
D. Thinking is a social phenomenon.

[填空题]The central heating system seems to have gone wrong.______ (为什么不叫修理工检查一下呢)