活塞式压缩机的一阶往复贯性力能用加平衡重的方法加以平衡。()

题型:判断题

问题:

活塞式压缩机的一阶往复贯性力能用加平衡重的方法加以平衡。()

考点:压缩机工考试制冷压缩机制冷压缩机题库
题型:判断题

下面选项中,画线的成语使用正确的一项是[ ]

A.许多大城市的办公楼、饭店和娱乐场所室内空气污染的程度已经不亚于室外, 然而大多数市民对此很不了解,甚至莫衷一是

B.城市绿化必须因地制宜,突出环境保护与人文景观和谐统一的发展观念。

C.听到 * * 这样风趣幽默的回答,一名外国记者忍俊不禁地笑了起来。

D.站在山顶四处眺望,只见经过退耕还林的山区风景秀丽,草木葱茏,进退维谷

题型:判断题

资产负债风险管理阶段的全球经济背景是()

A.海湾战争

B.布雷顿森林体系崩溃

C.金融自由化

D.恐怖主义泛滥

题型:判断题

对于高聚物改性沥青防水卷材采用条粘法施工时,搭接宽度为()

A.50mm

B.70mm

C.80mm

D.100mm

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

肯氏第一类牙列缺损为()。

A.单侧洲离缺失

B.双侧游离缺失

C.非游离缺失

D.间隔缺失

E.前牙缺失

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