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【单选题】
软组织的CT值是（）A.
10～20Hu
B.
20～50Hu
C.
100Hu左右
D.
B20～-10Hu
E.
B90～-70Hu或更低
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举一反三
【单选题】You must give more money to ALS Association when_____
A.
ｒｅｆｕｓｅ ｔｏ ｄｏ ｔｈｅ ｃｈａｌｌｅｎｇｅ
B.
ａｃｃｅｐｔ ｔｈｅ ｃｈａｌｌｅｎｇｅ
【单选题】Read the text and choose the best answer to complete each sentence. 3 You must give more money to ALS Association when you ______.
A.
accept the Ice Bucket Challenge
B.
refuse to do the Ice Bucket Challenge
【单选题】3 You must give more money to ALS Association when you ______.
A.
accept the Ice Bucket Challenge
B.
refuse to do the Ice Bucket Challenge
【单选题】When you receive an invitation from an American, you .
A.
should always accept it
B.
can refuse it
C.
should accept it even if you are busy
D.
must make sure your host is happy
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