行政效率测定的原则包括（）。 A.单一性 B.标准统一 C.量与质统一 D.全面性

对未取得驾驶证驾驶机动车的，追究其法律责任。

如图所示，A、B两带电小球可视为点电荷，Q_A=2×10^－8C、Q_B=－2×10^－8C，A、B相距3 cm．在水平外电场的作用下，A保持静止，悬线处于竖直方向，由此可知水平外电场的场强大小为　　　　，方向　　　 ．

濒临灭绝状态的稀有珍贵野生药材物种属于国家重点保护野生药材的级别为几级（）

A.1

B.2

C.3

D.4

E.5

自有中国历史以来，还没有过这样伟大而彻底的文化革命。( )

A. There had never been so a great and thoroughgoing cultural revolution since the dawn of Chinese history.
B. There had never been such a great and thoroughgoing cultural revolution from the dawn of Chinese history.
C. There had never been so great and thoroughgoing cultural revolution since the dawn of Chinese history.
D. There had never been such a great and thoroughgoing cultural revolution since the dawn of Chinese history.

钻机向着自动化、智能化方向发展。