侧送和散流器平送的出口风速采用()是合适的.
A、2~5m/s
B、3~5m/s
C、2~6m/s
D、3~6m/s
参考答案:B
最可能的诊断是
A.脑中风
B.颈椎病
C.颈椎肿瘤
D.颈椎结核
E.颈神经炎
After several days of heavy rain the roof()with a loud noise, crashing (坠落) onto the ground.
A.came out
B.came down
C.came on
D.came at