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【单选题】
圆弧加工指令 G02∕G03中I、K值用于指令A.
圆弧终点坐标
B.
圆弧起点坐标
C.
圆心的位置
D.
起点相对于圆心位置
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举一反三
【简答题】最常见的光敏化剂有：（）、（）。
【简答题】油脂光敏氧化最常见的光敏化剂有:______、______。
【简答题】新陈代谢(metabolism)
【简答题】患者19岁，近半个月来感觉右上前牙唇面有一龋洞，遇冷热酸甜敏感，无自发痛。可见光固化复合树脂的光照时间不得少于A、20～40s B、40～60s C、60～70s D、70～80s E、80～90s 最适合的修复材料是A、银汞合金 B、玻璃离子水门汀 C、传统型复合树脂 D、超微型复合树脂 E、磷酸锌水门汀 可见光固化复合树脂常用的光敏剂是A、樟脑醌 B、叔胺 C、BPO D、MMA E、UV-3...
【单选题】What does the example of New Jersey (Para. 4) illustrate?
A.
Schools in rich districts are usually choosy.
C.
Official sources are careful on the success of AC. C. New Jersey has more need for teachers than elsewhere.
D.
AC has turned out good teachers for schools.
【单选题】The author gives an example of a woman in Para. 5. What kind of relationship between the hostess and the Roomba does that example support?
A.
A woman and her secret lover.
B.
A mother and a competent helper.
C.
The master and the household appliance.
【单选题】What does the example of New Jersey (Para. 4) illustrate?
A.
Schools in rich districts are usually choosy.
B.
Official sources are careful on the success of A C.
C.
New Jersey has more need for teachers than elsewhere.
D.
AC has turned out good teachers for schools
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