The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity

ENUM类型的字段level定义为（LOW、MIDDLE、HIGH），ORDER BY level asc的顺序是 A: HIGH、LOW、MIDDLE B: LOW、MIDDLE、HIGH C: MIDDLE、LOW、HIGH D: HIGH、MIDDLE、LOW

( ) 6. There must be a time in every man's life ______. A: that he is in low spirits B: which he is in low spirits C: when he is in low spirits D: then he is in low spirits

Air tends to flow from a _______ pressure area to a _______ pressure. A: high, lower B: low, higher C: high, high D: low, low

digitalRead(KEY)==LOW语句中lOW表示（ ）。