使用手电钻注意事项中错误的是()。
A、使用前要空转检查
B、稍微斜对工作面施加压力便于起钻
C、用力均匀不宜过猛
D、即将钻通时要减轻压力防止卡钻
参考答案:B
阅读理解
In normal weather conditions, warm winds from South America blow from east to west across the Pacific Ocean. The winds early storms to Australia. These storms bring rain to Australia.
During an El Nino weather pattern the winds change direction. They blow from west to east across the Pacific Ocean. The storms no longer move across Australia. So Australia gets very little rain during El Nino.
The drought began in January , 1982. El Nino often Occurs at this time of year. But that year , El Nino was stronger than usual. There was very little rainfall(降雨量) in eastern Australia. There was also very little water in the rivers. The drought was at its worst in February ,1983 . At that time , the weather was very hot. The forests and fields were very dry. Cotton growers couldn't plant their cotton. Sheep farmers had no grass for their animals to eat. So many of them died. Because the forests were dry. forest fires started quickly. Some of the fires burned for a month. Many forests were destroyed. Over 2 , 000 people lost their houses in the fires and 75 people died.
The Australian drought ofl982-1983 affected thousands of people and animals. The drought cost the country over $ 3,000,000,000. It was a reminder(提示)to Australians of how the weather could change their lives.
1. From the passage we know El Nino is________.
A. a powerful storm
B. a place in Australia
C. a weather pattern
2. The underlined word "occurs" in the passage means “ ______” in Chinese.
A. 发生
B. 发展
C. 消失
3. Picture______ shows how EI Nino causes a drought in Australia.
4. Which of the following is NOT true according to the passage?
A. There was very little rainfall in eastern Australia in 1982.
B. Many forests were destroyed in the Australian drought.
C. The Australian government paid over ;3,000,000,000 for this drought.
5. What's the main idea of the passage?
A. A drought happened in South America.
B. El Nino caused a great drought in Australia.
C. Australia got much rain during El Nino
以下程序中函数f的功能是:当flag为1时,进行由小到大排序;当flag为0时,进行由大到小排序。void f(int b[],iIlt n,int flag){int i,j,t;for(i=0;ib[j]:b[i]A.1,2,3,4,5,6,7,8,9,10,B.3,4,5,6,7,2,1,8,9,10,C.5,4,3,2,1,6,7,8,9,10,D.10,9,8,7,6,5,4,3,2,1,
A.1,2,3,4,5,6,7,8,9,10,
B.3,4,5,6,7,2,1,8,9,10,
C.5,4,3,2,1,6,7,8,9,10,
D.10,9,8,7,6,5,4,3,2,1,