属于症状与体征的是
A.焦虑B.腹胀、腹痛C.母乳喂养无效D.与长期卧床有关E.有皮肤完整性受损的危险
参考答案:B
氨气(NH3)燃烧反应的化学方程式为4NH3 + 3O2 点燃 6H2O + 2N2。该反应属于
A.置换反应
B.化合反应
C.分解反应
D.复分解反应
A shepherd’s crook is used to().
A.lower spring buoys into the water
B.find an anchor after the buoy has been lost
C.transfer a pennant wire to the anchor handling boat
D.clean chain as it is hauled into the rig