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问题 多项选择题

病历摘要：患者女性，33岁，于一年前起经常感到头昏、乏力，动则心悸、气促，门诊以头昏原因待查收入院。

体检：神志清楚，精神可，T37．1℃，P76次/分，R18次/分，BP120/85mmHg。中度贫血貌，心率76次/分，律齐，心尖区可闻及柔和Ⅱ级收缩期杂音。腹部平软，无压痛反跳痛，肝脾肋下未触及，双下肢无水肿。

辅助检查：红细胞2．5×1012/L，血红蛋白72g/L，白细胞5×109/L，中性粒细胞0．7，淋巴细胞0．3，血小板计数130×109/L。红细胞形态偏小，染色较浅。大便常规（-），尿常规（-），X线检查：心肺无异常。

从病史及实验室检查看该病人的贫血极有可能是：（）。

A.大细胞性贫血

B.正常细胞性贫血

C.小细胞低色素性贫血

D.缺铁性贫血

E.再生障碍性贫血

F.溶血性贫血

答案

参考答案：C, D

填空题


A patrol team of sea lions and dolphins featured in a large-scale military exercises being conducted by the U. S. and its allies in the Pacific Ocean. The machine (1) took part in simulated mine recovery and mine detection missions during the biennial Rim of the Pacific Exercise (RIMPAC) war games. The (2) started on June 19 and will run (3) Friday.
"There are a number of mechanical systems that work in those areas. (4) high-tech gadgets deployed by the military can’t (5) the natural skills of dolphins and lions," said Tom Lapuzza, spokesman for UN Navy’s Marine Mammal Program. Sea lions have "incredible good underwater (6) " and can dive down to 300 meters to catch a recovery line to a mine, he said. Dolphins use sonar to (7) mine.
Human beings have a long (8) of training animals to join the military. Horses have been the most widely-used animals (9) the recorded history of (10) . In early times, horses were used to (11) chariots or to (12) armored forces. With the development of modem weapons and motorized (13) , the use of horses for military purposes fell into (14) . (15) , horses were still used (16) by the German army during World War II for transporting (17) and equipment, including artillery.
During World War II, (18) with explosives strapped to their backs were used as anti-tank weapons. In other (19) , they were used for detecting mines. Some dogs were also used as messengers.
Other animals have also (20) in the military. Recorded history shows the use of elephants for military purposes as early as 1,100 B. C.. They were employed during World War II by both the Japanese army and the (21) .
There are records showing that over 100,000 reindeer were used by Finland to tow sleds during World War II. They carried the (22) to hospitals, brought supplies to the troops and moved heavy anti-tank weapons. It is well documented that oxen have been (23) used in war as improvised beasts of burden. During World War II, spiders were employed by the Allies to spin silk for (24) in cross-hairs on bomb scopes and other optical instruments. People also are finding that Vampire bats’ ability to use echolocation is very interesting as we (25) to learn how it works and it may benefit the army.
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单项选择题

对代数式a2-2ab+b2进行因式分解属于______的问题。

A．有结构
B．无结构
C．界定含糊
D．无固定答案
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