To fully include graphics!

(1) the scientific name, common name and chemical formula of the substance (1) diamond, graphite: C (2) mercury, mercury: Hg (3) quicklime, calcium oxide: Cao (4) dry ice (solid carbon dioxide): CO2 (5) hydrochloric acid, hydrochloric acid: HCl (6) sulphite: H2SO3 (7) hydrogen sulfuric acid

Elementary knowledge of graphics As shown in the figure, line AB = 10cm. Take a point C on line AB to make AC = 3cm, and take the midpoint D of BC to find the length of AD l_ l l__ L A C D B (15 ~ 21 questions) questions can refer to the seventh grade of "mathematics class practice and evaluation" (1) P45 ~ 47

Because AB = 10
AC = 3
So BC = AB-AC = 10 - 3 = 7
Because D is the midpoint of BC
So CD = BD = 3.5
So ad = AC + CD = 3 + 3.5 = 6.5cm

According to the physical diagram as shown in the figure, draw the corresponding circuit diagram in the dotted line box

According to the diagram, the current starts from the positive pole and passes through S2, which is divided into two branches, one passing through L2 and the other passing through S1 and L1. After converging, it returns to the negative pole of the power supply. The circuit is shown in the figure:
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Please draw the circuit diagram corresponding to the physical diagram as shown in the figure in the dotted line box:

The two bulbs are in parallel, and the switch controls the whole circuit. The circuit diagram can be drawn as required

According to the given physical diagram, draw the corresponding circuit diagram in the dotted line box

(1) According to the physical circuit diagram, starting from the power supply, it is divided into two branches, one passing through L2 and S2; the other passing through L1 and then converging to switch S2 to return to the negative pole of power supply, i.e. two bulbs. The switch S1 controls the main circuit and the switch S2 controls the branch. The circuit diagram is drawn according to the physical circuit diagram, as shown in the figure:
(2) According to the physical circuit diagram, starting from the power supply, it is divided into two branches through s, one of which passes through the lights S1 and L1, the other through the switches S2 and L2, and then return to the negative pole of the power supply together, that is, the two lamps are in parallel, the switch S controls the trunk road, the switch S1 controls the branch where L1 is located, and the switch S2 controls the branch of the lamp L2

According to the physical connection diagram shown in the left figure, draw the corresponding circuit diagram in the dotted box on the right side of the physical diagram

According to the analysis, the two lights are connected in parallel. The ammeter measures the current in L1, and the voltmeter measures the voltage at both ends of the two lights. The switch is in the trunk circuit and connected to the positive pole of the power supply. The diagram is as follows:

In the circuit as shown in the figure, draw the corresponding circuit diagram in the box on the right

As shown in the figure

To make the light deflect as shown in the figure, draw appropriate optical elements in the box (keep the drawing trace), one is to use the reflection of light, the other is to use the refraction of light

(1) If a plane mirror is used, the bisector of the angle between the incident light and the reflected light is made, that is, the normal. Then, the vertical line of the line is made to obtain the position of the plane mirror, as shown in the figure
(2) After the light ray parallel to the main optical axis is refracted by the convex lens, the refracted light passes through the focus

According to the incident light and refraction light, draw the appropriate type of lens in the dotted box

In figure a, the divergent light becomes parallel after passing through the lens, so the lens converges the light and is a convex lens, as shown in the following figure:
In Figure B, the parallel light rays refracted by the lens become divergent, so the lens plays a role of divergence, which is a concave lens

Li Ming is in the Park photo studio. The camera staff can use the camera and the dressing mirror to display two images of Li Ming on the same negative by pressing the shutter once. Please draw the light path for taking photos in the picture

Make the symmetrical point s' of s in the plane mirror, so that the distance between s' and the mirror is equal to the distance between s' and the mirror. Connect s' with the camera, and intersect with the plane mirror at a point O, O is the incident point, and then connect s with the camera, as shown in the following figure:

To fully include graphics!