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【简答题】
位系统前的一个20mm高的物体被12mm的倒立实像,当物体向系统方向移动100mm时,其像无穷远处,求该光学系统焦距。(结果形式:负???毫米,无负号不用写)
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举一反三
【单选题】Which of the following is NOT Sharon's advice on checking your credit scores?
A.
Keep a copy of your credit report.
B.
Show your partner the credit report.
C.
Try to know your credit score.
D.
Lock your credit report away.
【单选题】The painting is not a (n) ______ works; it is a copy.
A.
original
B.
crude
C.
true
D.
fresh
【单选题】在SE序列中，射频脉冲激发的特征是（）
A.
a<90°
B.
90°-90°
C.
90°-180°
D.
90°-180°-180°
E.
180°-90°-180°
【简答题】A．She is not interested in the article. B．She would like to have a copy of the article. C．She has given the man much trouble. D．She doesn't want to take the trouble to read the article.
【单选题】Which of the following is NOT mentioned about the F6600-D Copy and Print System?
A.
It has a fax function.
B.
It has a scanner function.
C.
It costs a little less than $2,000.
D.
It can make reductions and enlargements.
【单选题】Which of the following is NOT true?
A.
After injection, the embryo gets a copy of the new gene as it divides.
B.
The injection method is less good because the new gene sometimes fails to join the embryo's genes.
C.
The retrovirus multiplies after it enters the cell.
D.
the incorporating method is less simple but better.
【简答题】肥胖病发生的主要诱因是( )。
【单选题】Which of the following is NOT true?
A.
After injection, the embryo gets a copy of the new gene as it divides.
B.
The injection method is less good because the new gene sometimes fails to join the embryo's genes.
C.
The retrovirus multiplies after it enters the cell.
D.
The incorporating method is less simple but better.
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