【单选题】Thomas Edison is spoken of because______.
A.
he also tried to invent a sewing machine
B.
he got some of his ideas from dreams
C.
he was one of Howe's best friends
D.
he also had difficulty in falling asleep
【单选题】关于完全抗原说法正确的是
D.
完全抗原与载体蛋白结合进入机体后可刺激免疫系统产生免疫应答。
【单选题】Thomas Edison is spoken of because________
A.
he also tried to invent a sewing machine
B.
he got some of his ideas from dreams
C.
he was one of Howe’s best friends
【单选题】As one of the most investors in modern society, Thomas Edison is credit for the following inventions except:
C.
The motion picture camera
D.
Commercial electricity
【单选题】土星的光环系统是目前我们所拥有的最接近45.5亿年前诞生地球和其他行星的尘埃、碎石盘的东西。这个原行星盘成形于一团由超低温气体和尘埃组成的星云在自身引力作用下的坍缩。随着这个转动的星云逐渐收缩,它就成了一个围绕新生太阳的盘。一旦太阳吹散了这些气体,盘中作轨道运动的碎石就和土星的光环系统极为相似。这段文字主要介绍了土星光环的:
【单选题】土星的光环系统就是目前我们所拥有的最接近45.5亿年前诞生地球和其他行星的尘埃、碎石盘的东西。这个原行星盘成形于一团由超低温气体和尘埃组成的星云在自身引力作用下的坍缩。随着这个转动的星云逐渐收缩,它就成了一个围绕新生太阳的盘,一旦太阳吹散了这些气体,盘中作轨道运动的碎石就和土星的光环系统极为相似。 这段文字主要介绍了土星光环的( )
【单选题】As one of the most prolific inventors in modern society, Thomas Edison is credit for the following inventions except
C.
The motion picture camera
D.
Commercial electricity