问题
单项选择题
脾梗塞在CT上表现为边缘清楚的低密度影，下列描述哪一个是正确的()
A.常为圆形或椭圆形，位于脾实质中心
B.常为圆形或椭圆形，紧贴脾包膜
C.常为三角形或梭形，尖端指向包膜
D.常为三角形或梭形，尖端指向脾门
E.以上都不对
答案
参考答案：D
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脾梗塞在CT上表现为边缘清楚的低密度影，下列描述哪一个是正确的()
A.常为圆形或椭圆形，位于脾实质中心
B.常为圆形或椭圆形，紧贴脾包膜
C.常为三角形或梭形，尖端指向包膜
D.常为三角形或梭形，尖端指向脾门
E.以上都不对
参考答案：D
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| Today many people like to travel by air. But in Germany, lots of people enjoy taking a high-speed intercity(城际)train. There are all kinds of 1 in the world. There are trains to carry people, trains to carry animals and trains to carry things. There are 2 trains and slow trains. Some trains go under the 3 and some trains go_4 the hills. In big cities, the streets are very busy, 5 you can find trains under the ground and trains on a rail(铁轨)above the streets. They 6 people in and out city. Can a train run over water? Yes, it 7 .There are many bridges over the river. The trains can easily run over the water. But it is not easy to build bridges. Today's trains have 8 for people. You may 9 something on the trains and have a good time just like on the 10 .And in China there is "a plane on the ground"-The Beijing - Tianjin intercity train. It's the fastest train in the world with a top speed of 350km/h. | ||||
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