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申请设立旅行社，经营国内旅游业务和入境旅游业务的，应当具备的条件是（ ）。
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皮皮学刷刷变学霸
举一反三
【单选题】急性左心衰竭的主要临床表现不包括
A.
突然发生的重度呼吸困难，端坐呼吸
B.
咳嗽频繁，咯粉红色泡沫样痰，肺部布满哮鸣音及双肺湿哕音
C.
心率加快，可闻室性奔马律
D.
皮肤苍白或发绀，严重者出现血压下降或休克
E.
下肢水肿
【简答题】Have you seen Jurassic Park? In this film, scientists use DNA kept for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter...
【简答题】Bats are amazing animals. There are many kinds of them. Most bats are black or grey in colour. And they have wings, too. Many people believed that bats couldn’t see. In fact, Bats can always find thei...
【多选题】急性左心衰的临床表现包括
A.
口唇紫绀、面色灰白、心率快、大汗淋漓、肢体湿冷。
B.
端坐呼吸或呼吸困难：患者呼吸浅快，出现三凹征；端坐咳嗽；
C.
急性肺水肿，患者可出现咳粉红色泡沫痰，以及肺内出现哮鸣音；
D.
夜间阵发性呼吸困难
【单选题】It can be inferred from the passage that scientists of the 18th century ______.
A.
thought they knew a lot and could solve most problems of science
B.
knew that they were ignorant and wanted to know more about nature
C.
did more harm than good in promoting man's understanding of nature
D.
were afraid of facing up to the realities of scientific research
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