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【判断题】
三相电路只要作 Y 形连接,则线电压在数值上是相电压的 倍。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】He was so committed to the ______ of his faith that he was unable to evaluate them impartially.
A.
credits
B.
doctrines
C.
certificates
D.
documents
【单选题】The term paper was due to December 1, but hard as he tried, he was unable to meet the _____ for it.
A.
challenge
B.
need
C.
deadline
D.
date
【单选题】He was unable to make much progress, hard ______ he tried.
A.
unless
B.
as
C.
however
D.
because
【简答题】左连接查询(LEFT JOIN 或 LEFT OUTER JOIN) (1)为文章表添加一条记录 (2)利用左外连接对文章表和栏目表进行查询
【简答题】He is unable to answer the questions about the new text．He__________it yesterday．
【单选题】He was unable to make such progress, __________________.
A.
as he tried hard
B.
as hard he tried
C.
so hard did he try
D.
hard as he tried
【单选题】A multinational firm can be defined as a firm that
A.
invests short-term cash inflows in more than one currency.
B.
has sales affiliates in several countries.
C.
is incorporated in more than one country.
D.
incorporated in one country that has production and sales operations in several other countries.
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