小敏同学在练习连接电流表的实验中，连好电路闭合开关试触时，发现电流表指针偏转到如图所示的位置，于是立即断开开关．产生这种现象的原因是： _________ ，为了能够继续实验，应该 _________ ．
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预算定额基价是指（）的人工、材料、施工机械使用费之和。
A．单位工程
B．分部分项工程
C．扩大分部分项工程
D．单项工程
The ancient Greek playwright Euripides followed the established conventions of verse composition less rigorously at the end of his career than at the beginning. Since the lines from a recently discovered Euripidean play adhere to those conventions as rigorously as do lines from Euripides’ early plays, the recently discovered play must have been composed early in Euripides’ career.
Which of the following is an assumption made in the argument
A．All of Euripides’ plays were written in verse.
B．Euripides did not write any plays late in his career in which he imitated the style of his early plays.
C．Euripides grew increasingly unaware of the established conventions of verse composition as his career progressed.
D．Late in his career, Euripides was the only playwright of his day who consciously broke with the established conventions of verse composition.
E．(E) Ancient playwrights tended to be less willing to violate certain conventions early in their careers than they were later in their careers.
新店开业促销协议价格一般有效期为（）个月.
A.1
B.2
C.3
资本经营环境具有（）基本特征。
A.系统性
B.针对性
C.动态性
D.静态性
对铁皮印刷的油墨要求很高，不属于这个要求范围的是（）
A、白色不变黄
B、附着力强
C、耐水蒸气和压力
D、抗菌