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【简答题】
感绿胶片的吸收光谱峰值是（）|感蓝胶片的吸收光谱峰值是（）|氦氖激光胶片的吸收光谱峰值是（）|红外线激光胶片的吸收光谱峰值是（）|钨酸钙荧光体发射光谱峰值是（） A. 420nm B. 550nm C. 633nm D. 820nm E. 950nm
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举一反三
【单选题】In this section, we will briefly describe possible ways of reducing the costs and risks ______ in doing this.
A.
involving
B.
involved
C.
to involve
D.
being involved
【单选题】磷酸锌水门汀在凝固时及凝固后可释放出游离磷酸,刺激压碎,正确说法不包括哪种
A.
可用于牙体缺损的暂时充填修复
B.
一般5~8周恢复正常
C.
可粘结嵌体、冠、桥和正畸附件
D.
可作深龋衬层
E.
一般是可逆的
【单选题】Which of the following is the main idea of the whole passage?
A.
There are three ways in which trees are important to human beings.
B.
Providing man with shelter is the most important role the trees play.
C.
Supplying man the wood and warship is the most important way the trees have.
D.
Assisting in stopping drought and floods is the most important role the trees play.
【单选题】Whether ways will be found to stop pollution or not is just___________ worries the public.
A.
why
B.
which
C.
that
D.
what
【单选题】听材料，回答下列问题：
A.
To describe ways pests can damage plants．
B.
To examine the life cycle of corn plants．
C.
To explain how corn plants develop．
D.
To describe how a natural pesticide works．
【简答题】简单电力系统如下图所示,求各元件的功率损耗和末端电压。
【单选题】磷酸锌水门汀在凝固时及凝固后可释放出游离磷酸,刺激牙髓,正确说法不包含哪种
A.
可粘结嵌体、冠、桥和正畸附件
B.
可用于牙体缺损的暂时充填修复
C.
一般5~8周恢复正常
D.
一般是可逆的
E.
可作深龋衬层
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