更多"Jupiter and Saturn are com worlds o"的相关试题:
[填空题]Jupiter and Saturn are com worlds of the solar system.
[单项选择]Like Jupiter, Saturn is a large ,gaseous planet composed......of hydrogen and helium.
(a)it is mostly
(b)mostly
(c)almost
(d)both are almost
[单项选择](Like) Jupiter (and) Earth, Saturn (is) flattened at (a) poles.（ ）
A. Like
B. and
C. is
D. a
[单项选择]Solar Power without Solar Cells
A dramatic and surprising magneticeffect of light discovered by University of Michigan1researcherscould lead to solar power without traditional semiconductor-based solar cells.
The researchers found a way to make an“optical 51 ,” said Stephen Rand, a professor in thedepartments of Electrical Engineering and Computer Science, Physics and AppliedPhysics.
Light has electric and magnetic 52 .Until now, scientists thought the effect of the magnetic field were so weakthat they could be 53 . What Rand and his colleagues found isthat at the right intensity, when light is traveling through a material thatdoes not 54 electricity, the light field cangenerate magnetic effects that are 100 million times stronger than previouslyexpected. Under these circumstances, the magnetic effects develop strength 55 toa strong electric effect.
“This could lead to a new kind of solarcell without semiconductors and without absorption to produce charge separation,
A. disc
B. fiber
C. instrument
D. battery
