Which zone is a system-defined zone？（）
A: null zone
B: trust zone
C: untrust zone
D: management zone
A: null zone
B: trust zone
C: untrust zone
D: management zone
举一反三
- In zone settling, sludge surface is between _____ . A: clean water zone and isoconcentration zone B: isoconcentration zone and transition zone C: transition zone and compression zone
- The distance of the intimate zone is ________________, the personal zone is ____________, the casual zone is ___________, the public zone is _______________.
- Wuzhou lies in _______. A: the tropical zone B: the cold-temperate zone C: the subtropical zone D: the temperate zone
- The unsaturated zone (vadose zone) is the area above the zone of saturation.
- Psychologists have identified four zones of interaction for Americans: the __________ zone, the __________ zone, the _______ zone, and the _______ zone.