【判断题】The downward-flowing water coats thefill and forms a film, thereby increasing the suce area for contact between thecool air and hot water. Hot air transfers heat to the cooler water it contactsin t...
【单选题】Many transcription regulators bind to the DNA helix as a ______. Such dimerization roughly doubles the area of contact with the DNA, thereby greatly increasing the potential strength and specificity o...