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【判断题】
3D打印技术材料的利用率为100% 。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Why am I saying my son ’ s description is wrong?
A.
Because the bird did not fly un stably as my son said .
B.
Because my son used the wrong grammar.
C.
Because the bird flew well.
D.
Because I don ’ t like my son ’ s description.
【简答题】救了“星期五”，鲁滨逊知道在另一个岛上住着十五个（）人，是海船失事后逃上去的。
【单选题】I am determined that my son ______ have a better start than I did.
A.
can
B.
shall
C.
must
D.
will
【简答题】当旅客索取遗留在饭店的财物时,饭店应当无条件返还,不能收取任何费用。____
【单选题】I look in through the window of the kindergarten at my daughter and my son, and I am very glad to find that all ______ well.
A.
has been
B.
have been
C.
is
D.
are
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