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【单选题】
工作许可。检修工作开始前，（）会同工作负责人共同到现场对照工作票逐项检查，确认所列安全措施完善和正确执行。工作许可人向工作负责人详细说明哪些设备带电、有压力、高温、爆炸和触电危险等，双方共同签字完成工作票许可手续。A.
工作票签发人
B.
工作许可人
C.
值长
D.
监护人员
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】dr___m (梦想)
【单选题】It costs her a lot of money, but she doesn't regret ______ a year traveling around the world.
A.
to have spent
B.
to spend
C.
spent
D.
spending
【单选题】It's high time that you _____ even harder at your lessons as the exam is around the corner. [ ]
A.
work
B.
will work
C.
worked
D.
have to work
【单选题】If you are too formal, people around you won’t be __________.
A.
at ease
B.
in danger
C.
in common
D.
at work
【单选题】The 'world car'
A.
sells extremely well in Europe.
B.
is not accepted by people around the world.
C.
doesn't adapt to the situation in each country.
【简答题】血红蛋白Hb和O2结合生成HbO2，CO能和Hb结合生成HbCO，CO和血红蛋白结合力比O2约大200倍。所以若空气中含有一定浓度的CO，会使人中毒。 (1)生成HbO2反应(Hb+O2=HbO2)的速率与Hb和O2的浓度都有关。速率常数k=1．8×106dm3.mol-1.s-1。人肺血液中O2的溶解度可达1．8×10-6mol.dm-3。相应的HbO2的生成速率为3．0×10-5mol.dm-...
【简答题】每次拿3个气球,( ) 次可以全部拿完.
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