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【简答题】
单位向量函数 r(t)= (cos3t，sin3t,0)关于t的旋转速度等于
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【简答题】简要说明学习评价的基本内容。
【单选题】It is no longer a problem _______ the poor children in this district can go to school.
A.
that
B.
whether
C.
so
D.
because
【简答题】看图短文填空。（1.5分X10=15分） The children in this neighborhood enjoy playing football 1______ much that they play it here and there even in the street whenever they are free. One afternoon, Jack saw a group o...
【单选题】The children in this class each _____new school bag.
A.
have
B.
has
C.
has got
D.
are having
【单选题】Has it been warned that all the children in this area stay at their homes until the Flu has been controlled ?
A.
can
B.
will
C.
may
D.
shall
【单选题】The children in this class each ______ a new school bag.
A.
have
B.
has
C.
has got
D.
are having
【单选题】______ the children in this poor village, we are very lucky. [ ]
A.
Living with
B.
Compared with
C.
Worried about
D.
Thanks to
【简答题】So it's not exactly small at all. And this boy did 6,000 meters in the morning. But the surprise is yet to come. The children in this kindergarten do 4,000 meters on average. And these children have t...
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