【单选题】It was only by a Great effort of will and courage that he was able to ___ himself together.
【单选题】It was only by a great effort of will and courage that he was able to______himself together.
【单选题】It was only by a _________ effort of will and courage that he was able to pull himself together.
【判断题】女性阴道内的环境呈弱酸性, PH值在4到4.5之间。这种环境下,阴道具有自净自洁的作用。()