硝酸装置低压蒸汽投用的设计温度为()℃。
A.200
B.210
C.220
D.230
参考答案:C
The scientist corresponds with colleagues in order to learn about matters ________ to her own research.
A.relevant
B.instant
C.resistant
D.important
在一定时期内,对于开发周期较短的房地产,供给弹性一般相应较高。()