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【单选题】
具有邻位酚羟基的黄酮用碱水提取时,保护酚羟基的方法( )A.
加硅胶吸附
B.
加硼酸络合
C.
加石油醚萃取
D.
加醋酸铅沉淀
E.
加四氢硼钠还原
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举一反三
【单选题】Part II 4. What does theauthor think the daily routine is?
A.
Dressing for work.
B.
Work with colleagues at the office.
C.
Sleeping normal hours.
D.
All the above.
【单选题】What is theauthor's purpose in stating that inhaling is like sucking air out of a balloon?
A.
To refute the argument that additional effort is necessary for breathing during sleep
B.
To argue that REM sleep is more important than NREM sleep
C.
To illustrate the difficulty of breathing during sleep
D.
To illustrate how blockage of narrow passages can be prevented during sleep
【简答题】Theauthor's attitude towards computerization seems to be [A] indifferent. [B] suspicious. [C] biased. [D] isupportive.
【单选题】According to theauthor,_________.
A.
war is the only way to solve internatioual disputes
B.
war will be less dangerous because of the improvement of weapons
C.
it is impossible for man to live without war
D.
war must be abolished if man wants to survive
【简答题】Theauthor's attitude towards this issue of using nuclear weapons against Japanseems to be [A] puzzled. [B] critical. [C] supportive. [D] objective.
【简答题】Theauthor seems to believe that [A] Mr. Stonecipher's downfall had to dowith the exchange of love e-mails. [B] Mr. Stonecipher's affair e-mails havebecome the public laughing stock. [C] Mr. Stoneciphe...
【单选题】How good of a resource is the Web in theauthor’s opinion?
A.
It’s quick, easy to access,and full of useful information.
B.
It’s only useful when it’s very easy tosubstantiate the data.
C.
It’s mainly useful for researching new orunfamiliar topics.
D.
It’s only useful if you can avoid all thedistracting websites.
【简答题】叶片泵的转子由 带动旋转。
【单选题】What does theauthor learn from his friend’s suicide?
A.
Desire to live is a kind of immortality.
B.
Courage is verycrucial and important.
C.
The truth of life is curiosity.
D.
To livemeans to do a lot of things.
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