平家物语属于（）？A、爱情物语B、宫廷物语C、战记物语D、市井物语

我国的法定记账方法是( )。

A．增减记账法

B．收付记账法

C．借贷记账法

D．单式记账法

对牙膏的探究要用到许多化学知识。

(1)下表列出了三种牙膏的摩擦剂，请在表中填写三种摩擦剂所属的物质类别。

(2)根据你的推测，牙膏摩擦剂的溶解性是________________________

(填“易溶”或“难溶”)。

(3)牙膏中的摩擦剂碳酸钙可以用石灰石来制备，某学生设计了一种实验室制备碳酸钙的实验方案，其流程图为：

请写出上述方案中有关反应的化学方程式，并注明反应类型：

①________________________________________________；

②________________________________________________；

③________________________________________________。

(4)请你仍用石灰石作原料(其他试剂自选)，设计实验室制备碳酸钙的另一种实验方案，依照(3)所示，将你的实验方案用流程图表示出来：

石灰石―→

你设计的方案的优点为：________________________________。

(5)检验牙膏中是否含有碳酸钙的实验方法是：__________________。

无缝钢管按外径和壁厚供货，在同一外径下有多种壁厚。( )

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.

依据我国民事诉讼法和相关司法解释的规定，下列关于管辖问题的哪一项表述是正确的( )

A．适用督促程序的案件只能由基层人民法院管辖

B．按级别管辖权限，高级人民法院有权管辖其认为应当由其管辖的第一审案件

C．协议管辖可以变更级别管辖

D．涉外民事诉讼中不动产纠纷由不动产所在地或者被告住所地法院管辖