题目内容
一般来说，金属黄原酸盐越易溶，则其相应的硫化矿物越易被黄药捕收。
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凡能够破坏或削弱矿物对捕收剂的吸附，增强矿物表面亲水性的药剂称之为抑制剂。
碳酸钠可以活化被石灰抑制的黄铁矿。
水泵装置总扬程 H＝Hst＋∑h 在实际工程中用于两方面：一是将水由吸水井提升到水塔所需的Hst 称为（） ；二是消耗在克服管路中∑h 称为：水头损失。
排序题 （每题10分，共50分）Heimlick Maneuver(海姆立克急救法)Young children often swallow small objects, which may become lodged in their throat or windpipe. If the child becomes silent and isn’t able to breathe, begin the Heimlick Maneuver immediately.Step 1Call 911 or ask someone else to call 911.Step 2Squat behind the child as he stands in front of you. Place one hand on top of the pelvis line, in the middle of the abdomen. ___1___Step 3If that doesn’t work, place the child face down across your lap. Put one fist below the point where the ribs meet the breastbone. ___2___Step 4Straddle your child’s thighs or sit at his side. ___3___Step 5Attempt to open the airway by tilting his head and lifting his chin. ___4___ if there is no breathing, exhale forcefully into his mouth and watch to see if his chest rises with your breath.Step 6Open the child’s mouth and look inside to see if you have dislodged the object. If you see the object, sweep it out with a hooked finger.Step 7___5___ If normal breathing has not returned, continue the thrusts.
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