本部分方要设备有哪些?
参考答案:
有焦炭塔,甩油泵,四通阀,放空塔,放空塔顶空冷器,放空塔顶油水分离器及放空塔底冷水器,甩油冷却器。
May 12th is Xiao Ming’s birthday. He us to his birthday party. [ ]
A. asks
B. invites
C. makes
D. tells
世界上第1台电子数字计算机ENIAC是在美国研制成功的,其诞生的年份是
A.1943
B.1946
C.1949
D.1950