一份稿件,小王用5小时打完,小华用4小时打完,两人合打几小时可以打完?正确列式是 请选择DCBA,w8m,z,N0u*d:](C/\9`0g0C/^8n2_
A.1/5+ 1/49`0g0C/^8n2_
B.1÷(5+4)9`0g0C/^8n2_
C.(1/5+1/4)× 1/29`0g0C/^8n2_
D.1÷(1/5+1/4)9`0g0C/^8n2_