【单选题】急性左心衰竭的主要临床表现不包括
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
【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...
【单选题】排水管道基础( )指管子与基础间的设施,使管子与基础称为一体,以增加管道的刚度。
【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...
【单选题】排水管道基础()指管子与基础间的设施,使管子与基础成为一体,以增加管道的刚度。
【单选题】飞轮作加速转动时,轮边缘上一点的运动学方程为 S = 0.1 t 3 (SI). 飞轮半径为 2 m .当此点的速率 v= 30 m/s 时,其切向加速度为 _______ __________ ,法向加速度为 _______ __________
A.
_ 6 m/s 2 _ _ ; 450 m/s 2 _
B.
_ 6 m/s 2 _ _ ; 250 m/s 2 _
C.
_1 6 m/s 2 _ _ ; 450 m/s 2 _
D.
_1 6 m/s 2 _ _ ; 250 m/s 2 _
【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;
【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