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【判断题】
高炉冷却壁是用铸造工艺加工制造的。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】— _____ have you been learning English? — I have been learning English for six years. [ ]
A.
How long
B.
How often
C.
How far
【单选题】—How many times have you been to China? —In fact, it is the first time I __________ here.
A.
have been
B.
am
C.
had been
D.
was