ForshipsequippedwithanSES,itis（）and（）fortheoperatortosendadistressalert.
A: easy/reliable
B: difficult/cheap
C: stable/compulsory
D: easy/expensive
A: easy/reliable
B: difficult/cheap
C: stable/compulsory
D: easy/expensive
举一反三
- What did the computer use to be（） A: Large, but cheap, easy to use. B: Large, expensive, very popular. C: Small, cheap, easy to use. D: Large, expensive, hard to us
- Sometimes the __________ (solve) to a problem is cheap and easy; sometimes it is difficult and expensive.
- Most of PowerShow.com’s features are______. A: convenient to develop B: expensive to buy C: difficult to log in D: easy to use
- Itis()tospendmoneyonsomethingyoudon'tuse. A: foolish B: hungry C: expensive D: cheap
- Finger-prints have often been used as a method of solving criminal case because it ______. A: is complicated but reliable B: is simple and not expensive C: is expensive but easy to do D: can bring a lot of money