High-paying senior three science students

Multiple choice BC

A is right, because we are looking at reducibility.

B No, the oxidation formula of this substance is based on reality. Lead and Pb have no positive trivalent and become PbO2.2PbO.

C no, it's not impossible, just considering the cost.

Yes, it is about oxidation.

1 There is a problem. They vowed to get back at their enemies.

There was a mistake in the past. Men usually prefer to work at home.

Holography is also called "holography". A new photography technology can record all the information in the light wave reflected by the subject.

Holography is different from traditional photography. What is recorded on the negative is not the plane image of a three-dimensional object, but the light field itself. Conventional photography only records the change of light intensity on the surface of the reported object, that is, only records the amplitude of light, while holographic photography records all the information of light waves, forgetting to record the phase of light waves except amplitude. That is to say, all the information of the optical wave field of the three-dimensional object is stored in the recording medium.

Holography is a lensless two-step imaging. The principle is that an interference pattern, called a hologram, is recorded on the photosensitive film by using the interference of object light and reference light, which is equivalent to making the film into an irregular grating, and then the original three-dimensional image is extracted by using the diffraction of appropriate illumination light by the hologram. The latter process is called reproduction. Hologram is a kind of natural information storage, which can "revive" the frozen scene in front of people.