汇编后，与语句X1 DB 2 DUP(4,6),5等同的是（ ）。 A: X1 DB 4,6,5 B: X1 DB 2,4,6,5 C: X1 DB 4,6,4,6,5 D: X1 DB 4,6,5,4,6,5
汇编后，与语句X1 DB 2 DUP(4,6),5等同的是（ ）。 A: X1 DB 4,6,5 B: X1 DB 2,4,6,5 C: X1 DB 4,6,4,6,5 D: X1 DB 4,6,5,4,6,5
随着时间变化，声压波动小于 （ ）的称为稳态噪声。 A: 1dB B: 2 dB C: 3 dB D: 10 dB
随着时间变化，声压波动小于 （ ）的称为稳态噪声。 A: 1dB B: 2 dB C: 3 dB D: 10 dB
2、As people connect _____ each other they are able to share their experience and learn from each other。
2、As people connect _____ each other they are able to share their experience and learn from each other。
There are still several unanswered questions _________with the accident. A: connect B: to connect C: connected D: connecting
There are still several unanswered questions _________with the accident. A: connect B: to connect C: connected D: connecting
The telephone used to ______________ you to the absent. A: connecting B: connect C: connected D: have connect
The telephone used to ______________ you to the absent. A: connecting B: connect C: connected D: have connect
Again, you can’t connect the dots looking forward. You can only connect them looking backwards, so you have to trust that the dots will somehow connect in your future.
Again, you can’t connect the dots looking forward. You can only connect them looking backwards, so you have to trust that the dots will somehow connect in your future.
He is wellsocially. (connect)
He is wellsocially. (connect)
People helping people is something I feel deeply _______. A: connect B: connect to C: connected D: connected to
People helping people is something I feel deeply _______. A: connect B: connect to C: connected D: connected to
练习：自由空间传播 1、在1米处的距离损耗为（ ）dB 2，在10米处的距离损耗为（） dB； 3、在100米处的距离损耗为（ ）dB， 4、在200米处的距离损耗为（） dB；
练习：自由空间传播 1、在1米处的距离损耗为（ ）dB 2，在10米处的距离损耗为（） dB； 3、在100米处的距离损耗为（ ）dB， 4、在200米处的距离损耗为（） dB；
当采用A律13折线进行非均匀量化时，其中第2、8段的量化信噪比改善量分别为（）dB、（）dB。
当采用A律13折线进行非均匀量化时，其中第2、8段的量化信噪比改善量分别为（）dB、（）dB。