The change of alert colors from amber to red implies that ______.
A. all poultry workers must leave their working places as soon as possible.
B. the officials in the Department of Health must call for much more of international assistance.
C. the most serious situation of bird-flu has appeared.
D. the change of the color functions greatly as the weather reports do.
会计凭证按其经济业务的内容不同，可以分为原始凭证和记账凭证两大类 ()
A. 正确
B. 错误
图3-9-1中是一前后两面临街、总深度为30m的矩形土地,其前街路线价(土地单价)为2000元/m2,后街路线价(土地单价)为1000元/m2。如果按重叠价值估价法,其前街影响深度为()。
A. 30m
B. 20m
C. 40m
D. 35m
茎圆柱形，表面黄绿或棕黄色，具纵棱线，断面中部有白色的髓，叶互生的药材是E．
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