A.hasn’t attracted much attention |
B.well-known to doctors and scientist |
C.was first found by Austrian researchers |
D.is dangerous to animals and human beings |
A.the virus could also cause other damages |
B.there must be something that is the real cause |
C.IAPV is not the only cause for the bee decline |
D.the virus may be caused by the polluted environment |
A.calculating | B.comparing | C.examining | D.investigating |
A.How and why to kill IAPV. |
B.How IAPV came to America. |
C.Whether bee products should be imported. |
D.How to change the rules of the bee products trade. |
A.Bee Disease | B.How to Kill IAPV |
C.A Virus—IAPV | D.Two Types of Fungi |
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