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【简答题】
根据室内散热设备传热方式不同,集中供暖系统分为两种:( )供暖系统和( )供暖系统。
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反馈参考答案：
举一反三
【简答题】报表的标题一般放在____________节
【简答题】Diskussion Single-Leben
【单选题】Tell John not to leave the house________he makes sure that all the lights are turned off. [ ]
A.
unless
B.
if
C.
once
D.
because
【单选题】Which of the following statements is true of Cindy?
A.
She always makes sure to attend the big events in the life of her sons.
B.
She comes to office on most weekends to catch up on her work.
C.
She always gives priority to work rather than to her family.
D.
She seldom has time to take a holiday.
【单选题】Bob, _____ sure to come to the meeting early tomorrow! [ ]
A.
is
B.
make
C.
be
D.
makes
【单选题】English people are sure that the 2012 London Olympics _____ the city environment better. [ ]
A.
makes
B.
will make
C.
made
D.
has made
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