[单项选择]Electrical appliance such as toasters or hair dryers are designed to ______ the ability of an electric current to heat a wire.

[单项选择]Electrical appliances such as toasters or hair dryers are designed to (take advantage of) the ability of an electric current to heat a wire.
A. augment
B. make sense of
C. make use of
D. reinstall

[单项选择]For your safety, the electrical appliance can only operate when it has been correctly mounted on a dry and cool base.
A. 你只有在干燥通风的地方操作这台电子仪器才安稳。
B. 只有在干燥通风的场所才能使电子仪器持续运转。
C. 为了安全起见，本电器设备只有安装在通风阴凉处才能确保其正常运行。
D. 为了安全起见，本电器设备只有安装在通风阴凉的基座上才能运行。

[填空题]Electrical and Electronic Products

[单项选择]Electrical engineers have repeatedly demonstrated that the best solid-state amplifiers are indistinguishable from the best vacuum-tube amplifiers with respect to the characteristics commonly measured in evaluating the quality of an amplifier’s musical reproduction. Therefore, those music lovers who insist that recorded music sounds better when played with the best vacuum-tube amplifier than when played with the best solid-state amplifier must be imagining the difference in quality that they claim to bear.
Which one of the following, if true, most seriously weakens the argument
A. Many people cannot tell from listening to it whether a recording is being played with a very good solid-state amplifier or a very good vacuum-tube amplifier.
B. The range of variation with respect to the quality of musical reproduction is greater for vacuum-tube amplifiers than for solid-state amplifiers.
C. Some of the characteristics that are important in determining how music sounds to a listener cannot be measured.
D. Solid-state amplifiers are more compact, use less power, and generate less heat than vacuum-tube amplifiers that produce a comparable volume of sound.
E. (E) Some vacuum-tube amplifiers are clearly superior to some solid-state amplifiers with respect to the characteristics commonly measured in the laboratory to evaluate the quality of an amplifier’s musical reproduction.

[单项选择]A retailer sold an appliance for 30 percent above cost, which represented a gross profit of $21.00. For what price did the retailer sell the appliance ？（）
A. $27.30
B. $51.00
C. $63.00
D. $70.00
E. $91.00

[填空题]BRIDGE ELECTRICAL
Telephone order
Item: 9. Belmont ______
Customer: 10. Ann ______
Model number: 11. ______
Delivery address: 12. 22 ______
13. on the ______
Delivery day: 14. ______
Today: 15. send a ______

[填空题]Nicotine molecules allow greater electrical charges to pass between neurones.

[填空题]What will happen to the appliance if you make a mistake in wiring-up a three-pin plug

[填空题]

A—Switching the appliance on by pressing the yellow switch lock and pushing the slide upwards.
B—The switch lock will prevent accidental switching on of the appliance.
C—Move the shaving heads quickly over the skin. Make Both straight and circular movements.
D—Shaving on a dry face gives the best results.
E—Your skin may need some time to get used to this shaving system.
F—Switch the appliance off.
G—Put the dust cover on the shaver.
H—Replace the shaving heads every 2 years for optimal shaving results.
I—To optimize the life of the appliance: do not leave the shaver connected to the mains continuously.
J—Do not recharge the shave in a closed pouch.

（）按下黄色的开锁键并把滑动键往上推，便可开动剃须刀。