A.high...thinner
B.higher...thin
C.high...thin
D.higher...thinner
第1题:
The condensers located in various stages of a flash evaporator are cooled by( ).
A.distillate
B.seawater
C.brine
D.air
第2题:
第3题:
Such problem ()air, water, and noise pollutions are becoming more and more serious in some big cities.
Alike
Bas
Cof
Dabout
第4题:
第5题:
第6题:
ground ________地面沉降