| A. leave B. signal C. brief D. interruption E. marking F. indicated G. practice H. resting I. unified J. struggling K. temporary |
What Is a Paragraph Break?
It is one of the most important punctuation marks. A paragraph break is an indentation（缩造）or a single line space
Generally, paragraph breaks serve to
Few readers would think of the paragraph break as a punctuation mark, but it certainly is. In ancient times there were no paragraphs. Sentences simply flowed into one another without
Today, the paragraph break is used to give readers a break. The art of creating paragraphs is called paragraphing, the
To fully understand when to insert a paragraph break, it’s helpful to know that a paragraph is a group of closely related sentences that develop a central idea. Therefore, each paragraph discusses one
Paragraphs used to be longer, but with the development of the Internet, which gives readers access to literally millions of sources of information, paragraphs have become increasingly
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| A. contact B. serve C. weakening D. form E. consciously F. swell G. leisurely H. proportion I. randomly J. grasp K. normal |
Why do fingers get wrinkly after a long bath or swim?
We know skin wrinkles as you get older or when you pinch it between two fingers. But it’s been somewhat of a mystery why skin gets wrinkly and even sometimes changes color after you take a
Often people assume that these wrinkles form because the skin absorbs water, which makes it
But researchers back in the 1930s discovered that in people with nerve damage in their fingers, the post-bath wrinkles didn’t
To explain what is happening, first you need to know a bit about the autonomic nervous system – the involuntary part of how your body works. Functions like breathing, blinking, your heart pumping or your pupils constricting in the sun all happen without your needing to
It also automatically controls the expansion and contraction of your blood vessels. This contraction of your blood vessels is also what causes the skin to wrinkle after a lengthy swim.
When your hands and feet come into
When tiny blood vessels inside the skin contract, they pull the skin’s surface down, forming the wrinkles you see after a long bath.
But does this skin wrinkling-when-wet
Researchers have found that wrinkled skin has added grip underwater in comparison to unwrinkled skin. Better grip lets you
Prolonged immersion in water makes skin more likely to break, but this
| A. steadily B. processes C. environmental D. displays E. covered F. varies G. severe H. influence I. inherited J. fortunately |
Many trees and shrubs change color in fall. For years, scientists have worked hard to understand the changes that happen to them. They find that three factors
The timing of the color change
However, some species are evergreen. Pines, for example, are green all the year round because they have toughened up. They have developed over the years a needle-like or scale-like foliage (绿叶植物), which is
| call like live necessary research separate success that think violent where worry |
Human beings and cats are believed to be friends. They
“This doesn’t
Give each cat the other cat’s toy along with lots of praise and rewards so they connect the smell with good things. After doing this a few times, set up a space
—If owners go slow and give lots of rewards, many cats can learn to accept a companion cat, Vitale says.
