【单选题】【消耗次数：1】
饮食中钙或（ ）缺乏，或吸收不良会导致骨质疏松。
①
维生素C
②
维生素A
③
维生素B
④
维生素D
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
I think you’ve got to the point ___ a change is needed, otherwise you’ll fail.
①
when
②
that
③
where
④
which
【单选题】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
①
had been working; are still working
②
had worked; were still working
③
have worked; were still working
④
have worked; are still working
【单选题】
Many people who had seen the film were afraid to go to the forest when they remembered the scenes ___ people were eaten by the tiger.
①
that
②
by which
③
which
④
in which
【单选题】
A candidate for the democratic presidential nomination ______ at this moment.
①
is interviewing
②
being interviewed D. Interviewing
③
is being interviewed
④
Interviewing
【单选题】
___ is often the case, we have worked out the production plan.
①
Which
②
When
③
What
④
As
【单选题】
There are many people ___ only on-line activity is sending and receiving e-mails.
①
who
②
that
③
which
④
whose
【单选题】
On his 10th birthday，Marty manages to escape from the zoo and gets onto the subway, ___ he believes that he can go to the wild.
①
which
②
from what
③
through which
④
that
【单选题】
He ___________ his friends for their help at the hotel now.
①
entertained
②
was entertaining
③
is entertained
④
is entertaining
【单选题】
___ is reported in the newspaper, talks between the two countries are making progress.
①
It
②
As
③
That
④
What
【单选题】
They are living with their parents for the moment because their own house __________.
①
is being rebuilt
②
has been rebuilt
③
is rebuilt
④
has rebuilt