题目内容：

B

The following are the results of the tests done by “Family and Home Magazine” on some Pocket Tape-Recorders on the market now.

Pearlcorder S702 $64

This simple model at the bottom of the Olympus range scored the most points for its excellent quality of recording. Background noise hardly affects the sound and recording from a pocket is perfectly possible, but it doesn’t turn off automatically.

Tape length: 30minutes per side. Weight: 240g.

Sony M9   $49.95

Small and very good looking, Sony’s latest offering scored most for its appearance. Sounds clear, but there is slight machine noise. The big control buttons are a great improvement on some of the complicated little controls on other tape-recorders. It doesn’t switch off automatically, but a red light shows if the machine is still running.

Tape length: 60minutes per side. Weight: 195g.

Sony M400  $115

Lots of little control buttons that make a noise are difficult to use. Recording is good but machine noise loses points. Tape counter and automatic switch-off when tape has finished recording or rewinding are useful.

Tape length: 60 minutes per side. Weight: 230g.

Imperial OEM MC7  $ 29.95

Cheap and simple compared with the rest, but recording is good as long as there is no background noise. Use only its own-make of cassette. No light to show it is on; no fast-forward button and the record button makes a loud noise.

Tape length: 30 minutes per side. Weight: 285g.

Philips 585  $80

Handsome and simple to use, but recording is very poor at more than the recommended distance of 5 cm-designed for dictation. No recording light.

Tape length: 15 minutes per side. Weight: 220g.

46. The machine that produces the best recording with the least unwanted noise is __.

A. Pearlcorder S 702     B. Sony M9

C. Sony M400          D. Imperial OEM MC7

47. If you want a machine which turns off automatically and weighs very little you should choose _____.

A. Pearlcorder S 702   B. Sony M9  C. Sony M400  D. Philips 585

48. Which of the following allows you to record longest but costs you least?

A. Philips 585   B. Imperial OEM MC7  C. Sony M400   D. Sony M9