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【单选题】
其实,不发达地区大都拥有丰富的资源,发展潜力很大。A.
In fact, most of the less developed areas are rich in natural resources, yet have great potentials for development.
B.
In fact, most of the less developed areas are rich in natural resources, and have great potentials for development.
C.
In fact, most of the less developed areas are rich in natural resources, but their development potential is very great.
D.
In fact, most of the less developed areas are rich in natural resources, as their development potential is very great.
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【单选题】Tom was very worried because there was something wrong______ the car.
A.
of
B.
with
C.
at
D.
by
【单选题】女，3岁半，体检是发现胸骨下缘近心尖区可听到Ⅱ～Ⅲ级收缩期杂音。经超声心动图检查，如图，确诊为房间隔缺损。杂音产生的机制是由于（）
A.
血流通过房间隔缺损时
B.
右心房血流量增加
C.
三尖瓣相对关闭不全
D.
右心室流出道相对狭窄
E.
二尖瓣相对狭窄
【简答题】Pete Gary called Joe William,saying that he will be twenty minutes late. This phone is from __1_ to __2_ The message is __3_
相关题目：
【单选题】Tom was very worried because there was something wrong______ the car.
A.
of
B.
with
C.
at
D.
by
参考解析：
知识点：
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