皮皮学，免费搜题
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搜题
【单选题】
凡由生物病原引起的园林植物病害（）相互传染。A.
B.
不能
C.
小部分能
D.
大部分能
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I had just started back for the house to change my clothes ________I heard voices.
A.
as
B.
when
C.
after
D.
while
【简答题】I had just started back for the house to change my clothes I heard voices．
【单选题】It’s years since I _______ him last time, and I haven’t written back to him.
A.
heard of
B.
heard out
C.
heard about
D.
heard from