请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
Mean low water is the average height of ______.
A.the surface of the sea
B.high waters and low waters
C.all low waters
D.the lower of the two daily low tides
答案
更多“Mean low water is the average height of ______.A.the surface of the seaB.high waters and l”相关的问题
第1题
此题为判断题(对，错)。
第2题
The fact that something is cheap doesn't ______ mean it is of low quality.
A．necessarily
B．especially
C．essentially
D．practically
第3题
A.mean sea level
B.mean high water
C.mean low water
D.half-tide level
第4题
A.mean high water
B.mean low water
C.half-tide level
D.mean sea level
第5题
A.Increase the transmitter power of BTS
B.Use a tower amplifier for BTS
C.Use more carrier frequencies for this cell
D.Increase the height of the antenna
E.Use an antenna with a low gain
第6题
Usually, cab drivers ______.
A．get high wages from the employer
B．get great benefits from the employer
C．get low wages from the employer
D．get high bonus from the employer
第9题
Another strategy of large desert animals is to tolerate the loss of body water to a point that would be fatal for non-adapted animals. The camel can lose up to 30 percent of its body weight as water without harm to itself, whereas human beings die after losing only 12 to 13 percent of their body weight. An equally important adaptation is the ability to replenish (Sheik) this water loss at one drink. Desert animals can drink huge volumes in a short time, and camels have been known to imbibe (吸收) over 100 liters in a few minutes. A very dehydrated person, on the other hand, cannot drink enough water to rehydrate at one session, because the human stomach is not sufficiently big and because a too rapid dilution of the body fluids causes death from water intoxication. The tolerance of water loss is of obvious advantage in the desert, as animals do not have to remain near a water hole but can obtain food from grazing sparse pastures. Desert-adapted mammals have the further ability to feed normally when extremely dehydrated, it is a common experience in people that appetite is lost even under conditions of moderate thirst.
What is the passage mainly about？
A．Animals developed different strategies to survive.
B．Large animals can take strategies to reduce the effect of extreme heat.
C．Animals can tolerate the loss of body water.
D．A very dehydrated person can drink enough water to rehydrate.
第10题
In ancient times, man settled near rivers or on fiver banks and built up large empires.
Water is Nature’s most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations all over the world rivers mean life and wealth. They feed and clothe the nations around them.
Water is also a source of energy and power. Man constructs huge dams across the river to control the water for irrigation and get the energy needed to drive generators. The electrical power is then directed to homes, cities, factories and television stations.
Man uses water each day. His main source of water comes from reservoirs, which in turn get their water from the rivers.
Rivers also bring down soil and minerals from the mountains and deposit them on the plains building up rich fiver deltas for raising plants and crops. Fresh water life in rivers or in lakes fed by them provide man with food.
In a small way rivers help to keep man in good health and provide for his amusements. Various forms of water sports keep man strong and healthy.
Rivers have run on this earth long before man. Man’s future ability to live is uncertain, but rivers will flow on forever.
Rivers have been important to man ______.
A．since the last century
B．for a very long time
C．since a few hundred years ago
D．since a few years ago
