已知定义域为R上的函数f(x)在区间(-∞，5)上单调递减，对任意实数t都有f(

“螳螂捕蝉，黄雀在后”这句成语揭示了动物之间的捕食关系．______．

患儿，3岁。2天来发热恶风，咳嗽频频，气急鼻扇，涕泪俱无，喉中痰鸣，舌红苔黄，脉浮数而滑。其证候是（）

A．痰热咳嗽

B．风热咳嗽

C．痰热闭肺

D．风热闭肺

E．热性哮喘

Preventer bars are fitted on lifeboat releasing hooks to prevent（）.

A.the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered

B.operation of the release lever until the boat is waterborne

C.the falls from rehooking after they have been released

D.accidental unhooking when the falls become slack

风窗调压法防止采空区自燃发火的适用范围和注意事项是什么？

根据排粪适量检查，将直肠前突深度分3度，中度为（）

A.6～15mm

B.15～30mm

C.20～30mm

D.15～20mm

E.16～30mm