The enviroment benefits, as it cuts down on the use of physical red envelopes.
查看答案
To activate the hongbao, you need to spend it on something first.
This hongbao, however, can only by used to purchase an airplane from boeing.
在国际病毒数据库中我国玉米粗缩病病原被认为很可能是____。
A. RBSDV
B. TuMV
C. MRDV
D. PRNVV
玉米粗缩病病毒，主要是由____传播。
A. 叶蝉
B. 蚜虫
C. 明飞虱
D. 灰飞虱
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