LNG槽车罐体真空绝热层的真空度每年检查()次。
A.1
B.2
C.3
D.4
参考答案:A
________, I have never seen anyone who is as capable as David. [ ]
A. As I have traveled so much
B. As long as I have traveled much
C. Now that I have traveled much
D. Much as I have traveled
井口甲醇加注泵最大排量为0.7m3/h;外输甲醇加注泵最大排量为1m3/h。