W: Yes, it was fantastic. Now I know why it is listed together with the Nile river as one of the great natural wonders of the world. Here, want to see the picture I took?
M: Oh what a view! It is even bigger than I had imagined. I remember reading about the Great Canyon and I think it said that it was formed suddenly when the earth crust split open during an earthquake.
W: Well, not that quickly. Look, here is the picture of th Colorado river. See way down at the bottom of the canyon, that river and its tributaries have been wearing the canyon floor away for ten million years.
M: Then the canyon is the result of soil erosion. I'll bet geologists have made some interesting discoveries there.
W: Not only the geologists, archaeologists have also found the bones of extinct animals in caves in the canyon walls. In a cave one hundred and forty feet above the river, they found drift wood that dated back as far as thirty-seven thousand years.
M: That means the river must have been a hundred and forty feet higher up when it carried the drift wood into the cave.
W: It's very possible, but of course who knows. The Great Canyon is full of mysteries. Wouldn't you like to go to Arizona some day?
M: You bet I would.
Where has the woman been?
A.To Colonado.
B.To Anzona.
C.To the Nile River.
D.To the Museum of Natural History.
第1题
下列哪项对诊断预激综合征最有价值
A.食管调搏检查
B.超声心动图检查
C.24小时动态心电图检查
D.心内电生理检查
E.冠状动脉及左心室造影
第2题
为明确诊断,下列哪项检查为首选
A.心电图
B.超声心动图
C.24小时动态心电图
D.心功能检查
E.心导管检查
第4题
对阵发性心悸和晕厥最有价值的检查是
A.常规心电图
B.24小时动态心电图
C.心内电生理检查
D.运动平板心电图
E.食道调搏
第5题
对诊断冠心病最有价值的辅助检查是
A.常规心电图
B.动态心电图
C.心电图运动负荷试验
D.超声心动图
E.心音图
第6题
哪项检查对本病的诊断最有帮助
A.X线心脏正侧位摄片
B.超声心动图
C.动态心电图
D.右心导管检查
E.心内膜心肌活检
第7题
哪项检查对本病的诊断最有帮助
A.X线心脏正侧位摄片
B.超声心动图
C.动态心电图
D.右心导管检查
E.心内膜心肌活检
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