恶性葡萄胎与绒毛膜癌的主要不同为（） A.浸润肌层 B.细胞明显增生和具异型性 C.
题型：单项选择题 A1型题
问题：
恶性葡萄胎与绒毛膜癌的主要不同为（）
A.浸润肌层
B.细胞明显增生和具异型性
C.转移 * * 结节
D.有绒毛结构
E.出血坏死
题型：单项选择题 A1型题
In the tour book below, four countries are missing. Try to identify them.
The combination of travel and volcanoes has not mixed well in recent times. Many thousands of holiday makers were left stranded in 2010 after the eruption of an Icelandic volcano created a dust cloud which covered much of mainland Europe and severely interrupted air travel. For some, though, volcanoes and travel are a combination made in heaven, with increasing numbers of enthusiasts booking specific excursions to visit volcanoes around the world.
So before you start digging out your passport, changing up your travel money and renewing your travel insurance, take a look at this list of the top 5 volcano travel break destinations and see what takes your fancy.
Italy
Italy is home to three active volcanoes, the largest of which is Mount Etna, situated on the east coast of the Italian island of Sicily. Etna is one of the ‘liveliest’ volcanoes on the planet and is almost constantly active – making it one of the best places in Europe to observe smoking craters and volcanic activity first hand. While in Italy you may also want to consider a trip to Pompeii, the ruins of a city decimated by the eruption of the Mount Vesuvius volcano and an impressive reminder of the true power that volcanoes hold.
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Situated on the boundary of the North American and Eurasian tectonic plates, it is an island whose very creation is a result of many undersea volcanic eruptions. Pay a visit to the beautiful landscape of its highlands and you can expect to see geysers, awe-inspiring glaciers and lava deserts alongside a selection of active volcanoes. You may also want to visit the site of the volcano that caused more pronunciation problems for newsreaders during the ash cloud crisis of 2010 than possibly any other name ever – Eyjafjallajokull.
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The mountainous Kamchatka region, located in Far East, is home to an incredible landscape of volcanoes and volcanic activity. One of the standout volcanoes of the region is the Mutnovsky Volcano, a combination of many merged craters that spew forth great jets of superheated water and plumes of sulphurous smoke.
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It is a group of islands said to have been ‘created by fire’ – formed after massive undersea volcanic activity in the Pacific. Quite apart from its reputation as a paradise island, which makes it a popular destination for many, it is undoubtedly a Mecca for volcano lovers. The Kilauea volcano on the Big Island is the most active volcano on the planet and – conditions permitting – you will be able to visit one of Kilauea’s active lava streams as it pours dramatically into the sea.
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Sitting on the border of the Pacific Ocean and the Caribbean Sea, the Central American country is another beautiful place that has many areas of volcanic interest for you to discover. Hikes to see the volcanoes here will take you from jungle to peak, through some of the country’s magnificent national parks. There, you can visit landmarks such as the Irazu Volcano and its stunning green lake.