生产某种产品,原需a小时,现在由于提高了工效,可以节约时间8%至15%,若现在所需要的时间为b小时,则_________<b<_________.
85%a,92%a
气压试验可以分为( )。
A.用于输送气体介质管道的强度试验
B.用于输送气体介质管道的严密性试验
C.用于输送液体介质的强度试验
D.用于输送液体介质的严密性试验
情景交际。根据对话内容,用适当的句子补全对话。
(A girl wants to buy a camera. Now she is in a shop. )
MAN: Good morning. 1______?
CIRL: Yes, please. I'd like to boy a camera.
MAN: We have many cameras here. Some are made in China, and some are made in other countries.
GIRL: This one looks very nice. 2______?
MAN: In Japan.
GIRL: 3______?
MAN: 5,000 yuan. This is a digital camera.
GIRL: Wow, that's too expensive! 4______. Do you have an ordinary one?
MAN: Sure. What about those ones?
GIRL: Well, this one looks very good. And the price is OK. Is it made in China?
MAN: Yes, it's made in Shanghai.
GIRL: OK, 5______.