Which of the following gestures can be seen as offensive? A: Thumbs up-------Iran B: Thumbs up--------Grace C: Ok------the USA D: Ok ------Grace

Giving the thumbs up to somebody in Greece is equivalent to being friendly.

What are needed to leave your fingerprints？(多选题） A: left hands B: right hands C: two thumbs

某拟建企业厂界与界外居民楼测点背景噪声值为55dB()、53dB(),预测投产后两处测点的噪声贡献值分别为55dB()、53dB(),厂界和居民楼处噪声预测值分别为(A)。A.58 dB(A)、56 dB(A)B.55 dB(A)、53 dB(A)C.55 dB(A)、56 dB(A)D.58 dB(A)、53 dB(A) A: 58 dB(A)、56 dB(A) B: 55 dB(A)、53 dB(A) C: 55 dB(A)、56 dB(A) D: 58 dB(A)、53 dB(A)

5. What do you need to use to leave your fingerprints？ A: left hands B: right hands C: two thumbs

According to WHO the normal hearing is ______. ( ) A: 10-20 dB B: 0-20 dB C: 0-25 dB D: 10-25 dB

The sound of a band is rated as 50 dB at a distance of 30.0 m. What is the dB sound level of the band when one is 10.0 m from the band? A: 59.5 dB B: 57.3 dB C: 55.2 dB D: 52.9 dB E: 50.1 dB

大型在线式UPS 噪声（）。 A: ＜55 dB B: ＜60 dB C: ＜70 dB D: ＜80 dB

According to the passage, not many animals have. A: Paws with fingers. B: Paws with thumbs. C: Paws without fingers. D: Paws without thumbs and fingers.

数据库系统包括( )。 A: DB、DBA B: DB、DBMS C: DB、DBMS、DBA、OS、计算机硬件 D: DB、DBMS、DBA、计算机硬件