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命名或写结构 1. 苯甲醚 2.甲乙醚 3. CH3-O-CH3 4. CH3CH2-OCH2CH3
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参考答案:
举一反三
【简答题】测量误差按其性质可分为 : 、
【多选题】测量误差按其性质可分为:
A.
系统误差
B.
偶然误差
C.
基差
D.
细差
【判断题】"To investigate, to improve, to study carefully, to decide to" is preferrable to "to make an investigation of, to make an improvement, to make a careful study, to make a decision" in writing.
A.
正确
B.
错误
【判断题】1909 年美国人莱特兄弟成功飞越英吉利海峡,开创了历史上第一次国际航行。
A.
正确
B.
错误
【简答题】c________ a . eager to investigate and learn or learn more prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【判断题】细菌是一类个体微小 ,形态 简单,具有细胞壁靠二次分裂繁殖 的多细胞原核微生物
A.
正确
B.
错误
【单选题】治疗犬化脓性骨膜炎时,不宜采取的措施是(2017 真题31)
A.
酒精热绷带
B.
10%醋酸铅冷敷
C.
0.5%普鲁卡因青霉素封闭
D.
红外线照射
E.
切开引流
【简答题】测量误差按其性质可分为哪几类?各有何特征?实际测量中对各类误差的处理原则是什么?
【简答题】According to the survey requirements in Chapter 1.2.2, your team may design an interview protocol to investigate the relationship between "language acquisition" and "language learning", and list some ...
【单选题】She hired a lawyer to investigate, only to learn that Gabriel had removed her name from the deed. The infinitive verb phrase "only to learn" is used .
A.
to express an intended purpose
B.
to indicate a high degree of possibility
C.
to reveal an undesirable consequence
D.
to dramatize a stated fact
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