The noise was so faint that you had to()your ears to hear it.
A、stir
B、strengthen
C、strain
D、stride
A、stir
B、strengthen
C、strain
D、stride
A、the engine stopped B、the engine was stopped C、he stopped the engine D、he had stopped the engine
A、the signal to noise of the current optical amplifier B、the signal to noise of the previous amplifier or source C、the signal to noise introduced by the optical multiplexer D、the accumulated noise to signal ratio of the optical channel
A、The canned orange had gone bad. B、She didn’t use the right kind of flour. C、The cookbook was hard to understand. D、She did not follow the directions closely.