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【单选题】
关于蛋白质四级结构的描述正确的是:A.
分子中必定含有辅基
B.
蛋白质变性时四级结构不一定受到破坏
C.
依赖共价键维系四级结构的稳定性
D.
在两条或两条以上具有独立三级结构多肽链的基础上，肽链进一步折叠、盘曲形成
E.
每条多肽链都具有独立的生物学活性
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举一反三
【单选题】Which of the following statements is true?
A.
In the last step, you should remember all the information.
B.
When you finish the last step, you will get both the main idea and the details.
C.
The mental conversation involves answering the questions asked by the author.
D.
While you are holding a mental conversation you select the important information.
【单选题】Which step is the last step in the accounting cycle? ( )
A.
Preparing the end-of-period spreadsheet.
B.
Preparing the adjusted trial balance.
C.
Preparing the post-closing trial balance.
D.
Preparing the financial statements.
【单选题】The last step is to __________.
A.
freeze the ingredients
B.
cool the ingredients
C.
mix the ingredients
【单选题】Which step is the last step of operating VTM?
A.
choose departure station
B.
pay the ticket
C.
choose the types of seats
D.
print ticket
【单选题】The last step is to .
A.
keep checking your plan so you know what you have to achieve
B.
cross things off on your plan when you’ve achieved them
C.
make sure you keep to your plan
D.
try and keep to your plan so you make real progress
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