Câu 1 A thermostat contains a strip or coil of steel and a strip or coil of copper, one on top of the other. As the strip / coil ______, the metals ______, but one does it faster than the other.

Câu 2 The strip / coil ______ and ______ with a switch, which ______ the power supply.

Câu 3 When the strip / coil ______, the metals ______ and the switch is ______.

Câu 4 The thermostat is ______ using a dial or other control.

Câu 5 A disc is ______ into the player and begins to ______.

Câu 6 At the same time, a thin beam of light called a laser ______ the disc and ______ digital signals into sounds or images, which can be ______ through speakers or ______ on a screen.

Câu 7 Volume or brightness can be ______ or ______ by means of a button, knob or other control.

Câu 8 Nowadays, discs are largely being ______ by storage devices like memory sticks, which have no moving parts.

Câu 9 A digital camera ______ of two main parts: a body and a lens.

Câu 10 When a button is ______ on the body, a window in the lens called a shutter ______ and light ______ the camera.

Câu 11 The amount of light going into the camera is ______ by both the speed of this shutter, and a smaller window called an aperture.

Câu 12 Both the shutter speed and the size of the aperture can be ______ by the person using the camera.

Câu 13 The light ______ a sensor in the body of the camera, which ______ the light as a digital image.

Câu 14 The image is ______ on a memory card in the camera, and this can later be ______ on to a computer.