Ifwelookfromspace，Earthisblue．Thebluepartsareoceans．Theycoverabout71%oftheEarth'ssurface．Howmuchdoyouknowabouttheoceans？PacificOceanItisthelargestanddeepestoceanintheworld．ItislargerthanalloftheEar

Question

If we look from space，Earth is blue．The blue parts are oceans．They cover about 71% of the Earth's surface．How much do you know about the oceans？
Pacific Ocean
It is the largest and deepest ocean in the world．It is larger than all of the Earth's land put together．The longest barrier reef（大堡礁） is in this ocean．
Arctic Ocean
It is a winter wonderland!It is the smallest ocean．On this freezing world，there are six months of daylight and six months of darkness．Imagine that!Here is the deepest point on Earth，the Mariana Trench（马里亚纳海沟）．It is 11 km below the water．It is higher than Mount Qomolangma．
Atlantic Ocean
It is the second largest ocean in the world．It is like the letter"S"．This ocean has the most salt．Titanic，the largest ship in the world，sank here in 1912．It hit an iceberg（冰山） on its first travel from the UK to the US．
Indian Ocean
It is the third largest ocean．It is also the warmest one，so there is less sea life than other oceans．

56．Which ocean is the largest one？___
A．Pacific Ocean　
B．Arctic Ocean　
C．Atlantic Ocean．
D．Indian Ocean．
57．How deep is the deepest point on Earth？___
A.1100 meters　
B.100 meters　
C.11000 meters　
D.110000 meters．
58．Which place did Titanic travel to in 1912？___
A．the UK　　
B．the US　　
C．the UN　
D．Germany
59．Why is there less sea life in Indian Ocean than in other Oceans？___
A．Because it is the smallest one．
B．Because it is the most salt．
C．Because it is the warmest one．
D．Because there are six months of darkness．

Answer 1

56．A细节理解题．根据第二段It is the largest and deepest ocean in the world可知太平洋是最大的海洋，故选A．
57．C细节理解题．根据第三段It is 11 km below the water可知海洋最深的地方有11000米深，故选C．
58．B细节理解题．根据第四段Titanic，the largest ship in the world，sank here in 1912．It hit an iceberg（冰山） on its first travel from the UK to the US．可知Titanic1912从英国到美国的首次旅行，撞上了冰山，故选B．
59．C细节理解题．根据第五段It is the third largest ocean．It is also the warmest one，so there is less sea life than other oceans．可知因为印度洋是最温暖的海洋，所以海洋的生物比其他海洋少．故选C．