四、短文填空
Water overflows (溢出) onto dry land and a flood happens. People build the cities along rivers because they use the water for drinking and 1.
farming
(farm). For that reason, river floods affect many people. People usually build dams (堤坝) to protect lands 2.
from
river flooding.
Floods can be dangerous. They often leave the villages or towns in 3.
a
terrible state. People may be 4.
trapped
(trap) in a place for days without food. 5.
However
, floods are not always bad. When muddy floodwater goes down, it sometimes leaves a layer (层) of wet earth (泥土). People in the past grew their crops, like rice and corn by 6.
using
(use) the wet earth.
Most often flooding is caused by heavy rain. After the rain, the ground becomes full of water, and new rainwater runs off, or flows downhill. The extra (多余的) water makes the water level (水位线) rise. If the level 7.
rises
(rise) too much, a flood will happen.
Flash floods(暴洪) are the most serious kind of flood. They are caused by sudden heavy rainfall or a 8.
broken
(break) dam. They happen very 9.
quickly
(quick) and can catch people before they are able to get away. Flash floods often happen in hilly countries or around dry riverbeds. In a flash flood, a completely dry riverbed can fill in 10.
minutes
(minute).
解析:
翻译:
### 四、短文填空
水溢出到陆地上,洪水就发生了。人们沿着河流建城,因为他们用水来饮用和1.
耕种
(farm)。出于这个原因,河流洪水影响很多人。人们通常修建堤坝来保护土地2.
免受
河流洪水的侵害。
洪水可能很危险。它们常常使村庄或城镇处于3.
一种
糟糕的状态。人们可能会4.
被困
(trap)在一个地方好几天没有食物。5.
然而
,洪水并不总是坏事。当浑浊的洪水退去时,有时会留下一层湿土。过去的人们通过6.
利用
(use)湿土来种植他们的庄稼,比如水稻和玉米。
大多数时候洪水是由暴雨引起的。雨后,地面充满了水,新的雨水流走,或者向下坡流动。多余的水使水位上升。如果水位7.
上升
(rise)太多,就会发生洪水。
暴洪是最严重的一种洪水。它们是由突然的暴雨或8.
破裂的
(break)堤坝引起的。它们发生得非常9.
迅速
(quick),能在人们来得及逃离之前就降临。暴洪经常发生在多山的国家或干涸的河床附近。在一场暴洪中,一条完全干涸的河床能在10.
几分钟
(minute)内被填满。