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【单选题】
在实际生产过程中，为提高反应过程目的产物的单程收率，宜采用以下哪种措施（）。A.
延长反应时间，提高反应的转化率，从而提高目的产物的收率；
B.
缩短反应时间，提高反应的选择性，从而提高目的产物的收率；
C.
选择合适的反应时间和空速，从而使转化率与选择性的乘积（单程收率）达到最大；
D.
选择适宜的反应器类型，从而提高目的产物的收率。
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举一反三
【单选题】¿ cuál es la que no tiene nada que ver con la religión?
A.
La Navidad
B.
el Año Nuevo
C.
los Reyes Magos
D.
la corrida de toros
【单选题】¿Cuál es la religión oficial de España?
A.
Es un estado aconfesional
B.
La religión católica
C.
La religión ortodoxa
D.
La religión cristiana
【单选题】It was __________she was injured in the accident _______ she didn’t come to the party yesterday.
A.
as; which
B.
because; that C since; why D. for; how
【简答题】(reveal, novelty, dispute, immune, inspire, extract, substance, incite, reconcile, consult) 2. 这种青霉素非常罕见,能够产生大量抗菌物质。 It was a rare type extraordinarily productive in antibacterial ________.
【简答题】There are three things which the public will always ______(强烈要求) for, namely , novelty, novelty, novelty.
【单选题】The asocial personality of Americans may stem from ______.
A.
the absence of a common religion and ancestry
B.
the multiracial constituents of the US society
C.
the want of a shared myths they possess in life
D.
the counterbalance to narcissistic personality
【单选题】I couldn't imagine ________ difficult it was for these badly injured victims to make it to the hospital.
A.
when
B.
how
C.
what
D.
where
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