下列哪种组织由外胚层上皮发育而来（） A.釉质 B.牙骨质 C.牙周膜 D.牙槽骨

××商场建筑面积为28400m²，钢筋混凝土框架结构，箱形基础，地下2层，地上8层。某天，按施工进度计划要求正在搭没扣件式钢管脚手架。安全员检查巡视时发现新购进的扣件商标模糊、表面粗糙，有的已显锈迹，便向架子工询问，工人说，有的扣件螺栓滑丝，有的扣件一拧，小盖口就裂了。安全员对此批扣件的质量产生了怀疑。
根据以上情况，回答下列问题：

为防止安全事故的发生，请问安全员应如何处理此事

(10分)为了验证酵母菌的发酵作用，李娜同学做了如下的实验，实验步骤如下：

①将一定量的干酵母和蔗糖放入右图中的瓶内，并加入一些温开水，摇匀。

②将一只未充气的小气球套在瓶口上(如图)。

③将瓶子放在教室内的窗台上(或温暖的地方)，每天观察瓶中的情况。

请回答下列问题：

(1)瓶中的液体会有什么现象发生?                   

(2)套在瓶口上的小气球会出现什么现象?为什么?

(3)要将瓶中的水、酵母菌、蔗糖充分摇匀的原因是：                             

(4)为什么要将瓶子放在温暖的地方?                             

(5)上述实验在日常生活中有何应用?试举例说明。                        。

女性，57岁，绝经3年，近2个月出现少量 * * 流血，伴下腹胀痛。妇科检查： * * 无异常，宫颈光滑，子宫稍大、略软，双附件正常。

术后病理再次证实为透明细胞癌，且已有淋巴结转移，随后的治疗应当是（）

A.术后加放射治疗

B.术后加甲羟孕酮400mg／d，连用2个月

C.术后加他莫昔芬10mg／d，连用2个月

D.手术已可满足要求，随访即可

E.术后不能加用化疗

某宗地系国有土地，土地使用权人为某公司，通讯地址为：××市××路××号。依据2004年6月20日该市工商行政管理局颁发的经过变更地址登记后的《企业法人营业执照》，该公司的地址变更为××市××路××号，该企业向有关提出该宗地地址变更登记。 问题 1．宗地地址变更登记的三个要件是什么 2．宗地地址变更登记的申请人是谁 3．办理宗地地址变更登记的申请人应当向有关部门提交的土地权属证明文件有哪些

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.