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【多选题】
氢原子的能级如图所示,已知可见光的光子能量范围约为1.62~3.11 eV,紫外线的能量大于可见光子的能量,下列说法正确的是( )A.
处于n=3能级的氢原子可以吸收任意频率的紫外线,并发生电离
B.
大量氢原子从高能级向n=3能级跃迁时,可能发出可见光
C.
大量处于n=4能级的氢原子向低能级跃迁时,可能发出6种不同频率的光
D.
一个处于n=3能级的氢原子向低能级跃迁时,最多可能发出3种不同频率的光
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【单选题】The correct sequence of hemostatic events is
A.
vessel contraction, plug formation, and blood clot
B.
blood clot, plug formation, vessel contraction
C.
plug formation, blood clot, vessel contraction
D.
vessel contraction, blood clot, plug formation
【单选题】The correct sequence of the following links is ( ).
A.
offer - enquiry - counteroffer - acceptance
B.
offer - counteroffer - enquiry - acceptance
C.
enquiry - offer - counteroffer - acceptance
D.
enquiry - acceptance - offer - counteroffer
【简答题】酵母菌细胞壁的主要成分是葡聚糖和 [填空(1)] 。A. 甘露聚糖
【单选题】The correct sequence of the following links is
A.
offer-enquiry-counter-offer-acceptance
B.
enquiry-offer-counter-offer-acceptance
C.
offer-counter-offer-enquiry-acceptance
D.
enquiry-acceptance-offer-counter-offer
【简答题】A glance through his office window offers a panoramic view of the Washington Monument and the Lincoln Memorial.
【单选题】I just had time to glance through the ________ of the newspaper this morning.
A.
headlines
B.
word
C.
sentence
【单选题】The correct sequence of the following phrase is .
A.
a new beautiful black Italian leather jacket
B.
a beautiful black new Italian leather jacket
C.
a beautiful new black Italian leather jacket
D.
a beautiful new Italian black leather jacket
【简答题】_LTE最小的资源单位是_____，最小的资源分配单位是____。
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