QUES: During the Five Dynasties and Ten Kingdoms period of China (907960), while the fractured political realm of China saw no threat in a Tibet which was in just as much political disarray, there was little in the way of Sino-Tibetan relations. Few documents involving Sino-Tibetan contacts survive from the Song dynasty (9601279). The Song were far more concerned with countering northern enemy states of the Khitan-ruled Liao dynasty (9071125) and Jurchen-ruled Jin dynasty (11151234).

What dynasty was concerned with countering northern enemy states?
What is the answer?
ANS: Song dynasty
QUES: Although the Reformation was a religious movement, it also had a strong impact on all other aspects of life: marriage and family, education, the humanities and sciences, the political and social order, the economy, and the arts. Protestant churches reject the idea of a celibate priesthood and thus allow their clergy to marry. Many of their families contributed to the development of intellectual elites in their countries. Since about 1950, women have entered the ministry, and some have assumed leading positions (e.g. bishops), in most Protestant churches.

What religious movement affected education, politics, the economy, and marriage?
What is the answer?
ANS: the Reformation
QUES: Antennas are characterized by a number of performance measures which a user would be concerned with in selecting or designing an antenna for a particular application. Chief among these relate to the directional characteristics (as depicted in the antenna's radiation pattern) and the resulting gain. Even in omnidirectional (or weakly directional) antennas, the gain can often be increased by concentrating more of its power in the horizontal directions, sacrificing power radiated toward the sky and ground. The antenna's power gain (or simply "gain") also takes into account the antenna's efficiency, and is often the primary figure of merit.

What is often the most imprtant crediting factor of antennas?
What is the answer?
ANS:
efficiency