介绍的顺序一般是把身份低、年纪轻的介绍给身份高、年纪大的,把男同志介绍给女同志。()

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问题:

介绍的顺序一般是把身份低、年纪轻的介绍给身份高、年纪大的,把男同志介绍给女同志。()

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患者,男性,4岁,发热伴唇红干燥、皲裂、出血一周就诊。检查:体温39℃,唇红干燥、结痂,舌菌状 * * 突起,眼结膜充血,全身皮肤荨麻疹样皮疹,颈部淋巴结肿大。

最可能的诊断是()

A.败血症

B.猩红热

C.皮肤黏膜淋巴结综合征

D.药物过敏性口炎

E.多形性红斑

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15岁男孩,左小腿上段进行性疼痛3个月余,偶有轻微发热、查体:左小腿上:段外侧方可触及一质硬包块,有轻微压痛、左下肢X线片示:左侧腓骨骨干边界模糊,存在不规则的破坏区,周围伴“葱皮样”反应骨形成。

如果经活组织检查证实为Ewing肉瘤.则其最可能来源于()

A.骨髓细胞

B.成纤维细胞

C.成软骨细胞

D.成骨细胞

E.破骨细胞

题型:判断题

在胶结物中,强度最大的是()。

A.铁质

B.硅质

C.泥质

D.钙质

题型:判断题


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.

题型:判断题

电动机定子里安放着互差120º的三相绕组,流过对称的三相交流电流时,在定子里将产生()。

A、恒定磁场

B、脉动磁场

C、旋转磁场

D、运动磁场

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