老年人唾液分泌减少,每日分泌量约为()。A.150~300ml B.350~500m

题型:单项选择题

问题:

老年人唾液分泌减少,每日分泌量约为()。

A.150~300ml

B.350~500ml

C.500~650ml

D.650~800ml

E.800~1000ml

考点:基础医学人体发育学人体发育学题库
题型:单项选择题

下列各项中哪一项不是丸剂的特点()

A.不易变质

B.药力持久

C.适用于慢性虚弱性病证

D.服用方便

E.吸收缓慢

题型:单项选择题


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:单项选择题

加热炉内煤气燃烧时,缺氧燃烧的症状包括()。

A.火焰暗红无力

B.火焰短

C.炉内气氛浑浊

D.有时冒黑烟或在烟道中燃烧

题型:单项选择题

甲企业向乙保险公司投保企业财产保险,在保险期限内,因暴风引起电杆倒塌,电线短路引起火花,火花引燃厂房,从而导致保险标的严重受损。下列属于保险标的损失的近因是()

A.暴风

B.电杆倒塌

C.火花

D.厂房燃烧

题型:单项选择题

在DU(显示组件)的屏幕上显示“INVALID DATA”(无效数据)的信息说明:()

A、相应的系统信息丢失

B、显示组件失效

C、与这个DU相关的DMC失效

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