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【单选题】
The author felt distressed because of his student's inability to express herself. "distessed" means _______A.
very exicted
B.
thrilled
C.
extremely unhappy
D.
overjoyed
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举一反三
【判断题】The protein has the properties of UV absorption, which has the maximum absorption peak at 260nm.
A.
正确
B.
错误
【简答题】益智数学题 小华做4道应用题用了28分钟，照这样计算，91分钟可以做几道应用题？
【单选题】The hyperchromic effect refers to the increase in the UV absorption of DNA. This is a result of:
A.
Annealing
B.
Melting of DNA
C.
B to Z-DNA conversion.
D.
Increased hydrogen bonding between strands.
E.
Renaturation of DNA
【简答题】用递等式计算 （1）六g+t6九÷（g九.g-g.g） （g）g8×（4t8÷六t）+19g （t）（1t6-88）×1t÷g6 （4）g4t×（g1九÷t九+18） （g）6吨4千克-g吨14千克 （6）g千克1九克+18千克六1九克．
【简答题】Instruments for measuring the absorption of UV, visible, and near-IR radiation are made up of one or more (1) ___________, (2) _____________, (3) _______________, (4)________________, and (5) ________...
【简答题】根据算式编应用题．（38-3.5×4）÷6-3.5．
【简答题】The absorption of UV or visible radiation generally results from _________ of bonding electrons.
【简答题】有公鸡126只，母鸡的只数是公鸡的6倍，鸭的只数比公鸡和母鸡的总只数少4f只，鸭有多少只？（会用两种方法做，就用两种方法做）
【简答题】图G=(V，E)有6个结点，其度数分别为1，4，4，3，5，5，问G有多少条边?
【简答题】在图所示电路' 1 =G'' 1 =1S，G 2 =2S，G 3 =3S，G 5 =5S，G 6 =6S，U S1 =1V，U S3 =3V，I S4 =4A，I S6 =6A，试用节点分析计算各支路电流。
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