题型:任务型阅读 题类: 难易度:普通
湖南省衡阳市祁东县2024届高三下学期第三次联考三模英语试题
When we hold our breath and go underwater, we'll soon be unable to stand it. However, there's little chance of catching up with the Sama-Bajau, who can stay underwater with a single breath for quite a long time.
Sama-Bajau is a collective term(集合术语)that refers to several closely related native peoples. The Bajau live on long houseboats or small wooden houses that are built on the sea, close to the shore in Southeast Asia.
As they make their living primarily from fishing, they have become exper t free divers(自由潜水者). Bajau divers have the longest daily diving time without breathing among allhumans. In their free time, the kids help around the house or play on the beach.
It appears that centuries of free diving have scientifically distinguished the Sama-Bajau. According to research, the Bajau's spleens(脾脏)are much larger than the average people's on land. Besides, the Bajau have also developed excellent underwater vision.
The main cause is massive fishing, which has made it increasingly difficult for the Bajau to make a living and rely on fishing alone. As a consequence, more and more people are leaving the seas, and apparently, it's only a matter of time before the Bajau and their amazing qualities disappear.
A. Larger spleens can have some weaknesses.
B. Therefore, many older divers are hard of hearing.
C. The difference makes the Bajau quite able to dive underwater.
D. They only go ashore to trade or seek shelter during sea storms.
E. Bajau children master swimming and diving skills at an early age.
F. The existence of this special group of people is threatened nowadays.
G. With free diving training, we can increase the time underwater by a few minutes.
These are instructions for making invisible ink using baking soda.
Difficulty: |
Easy |
Time required |
A few minutes |
What you need |
Baking soda Paper Water Light bulb Paintbrush Measuring cup Purple grape juice |
Here's how: |
There are at least two methods of using baking soda as invisible ink. Mix equal amounts of water and baking soda. Use a paintbrush to write a message onto white paper, using the baking soda solution (溶液) as “ink”. Allow the ink to dry. One way to read the message is to hold the paper up to a heat source, such as a light bulb. The baking soda will cause the writing in the paper to turn brown. The second way to read the message is to paint over the paper with purple grape juice. The message will appear in a different color. |
Tips: |
If you are using the heating method, avoid igniting (点燃) the paper. Baking soda and grape juice react with each other in an acid-base (酸碱) reaction, producing a color change in the paper. Grape juice concentrate (浓缩物) results in a more visible color change than regular grape juice. |
试题篮