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【单选题】
大树移栽时土球直径一般胸径的A.
2倍
B.
3-4倍
C.
7-10倍
D.
10倍以上
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反馈参考答案：
举一反三
【单选题】Because it’s raining heavily, there are few people in the street, ____?
A.
are there
B.
aren’t there
C.
does there
D.
doesn’t there
【单选题】some juice and milk in our fridge(冰箱).
A.
There have
B.
There are
C.
There is
D.
There
【单选题】Are there many people there?
A.
Yes， there are．
B.
Yes， there is．
C.
No， there aren’t
D.
No，there's no．
【单选题】How many umbrellas were there in Jack's home?
A.
There were nine.
B.
There were eight.
C.
There was only one.
【单选题】心理性ED与器质性ED的疾病发展关系
A.
心理性ED与器质性ED是并行关系
B.
器质性ED是导致心理性ED的先决条件
C.
心理性ED长期不重视和治疗会导致器质性ED
D.
心理性ED是器质性ED的必要条件
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