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【单选题】
如果平行反应均为一级不可逆反应,若活化能E主>活化能E副,提高选择性Sp应()A.
提高浓度
B.
提高温度
C.
降低浓度
D.
降低温度
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【单选题】According to an expert, when children reach school age, they cannot help their parents learn what can and cannot be done.
A.
√
B.
╳
【简答题】Translation : What is done cannot be undone.
【简答题】What cannot be done and why? prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> She can’t clean the , because there is no .
【简答题】晶闸管的英文缩写是( )。(请用大写表示)
【单选题】If the meter needle of the oxygen indicator cannot be set to zero，what should be done ________．
A.
Replace the batteries
B.
Check the sampling tube for blockage
C.
Adjust the final reading by the amount the needle is displaced from zero
D.
Replace the platinum filament
【简答题】What extra support can be done over RTP and RTCP that cannot be done over UDP?
【简答题】门极可关断晶闸管的英文缩写是( )(请用大写表示)
【简答题】IGCT是集成门极换流晶闸管____的英文缩写。
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