Five million people visit Grand Canyon in the US every year. For the purpose of helping project Grand Canyon for your fellow visitors and future generations, please follow the guidelines below.
To project the park, camping is allowed only within permitted campgrounds. Permits are required for overnight camping at the North Rim. Advance booking can be received by mail. Please write: Information Center, P.O. Box 129, Grand Canyon, AZ 86023
Because of the extreme fire danger, campfires are not allowed except at Mather and Desert View campgrounds. Collection of firewood is not allowed either.
Please stay on permitted paths. Otherwise you may destroy desert plants. Pack out what you pack in, so you leave no signs of your visit. It is important to keep in mind that you are in a national park where wildlife exists.
The weather at Grand Canyon can change very quickly. With so much rock, lightning causes a particular danger during sudden summer storms. These storms also frequently bring floods inside valleys, a danger to hikers. Watch the sky and check daily weather reports.
Do not feed park wildlife. There have been a few cases at Grand Canyon National Park where deer were purposely shot because there were plastic bags that left them sick and weak. Hungry deer can be a danger and have kicked and bitten visitors at Grand Canyon. Some other animals will also beg and bite. For your own safety and the well-being of the animals, please do not feed wildlife, no matter how gentle they may appear.
What can you do first if you want to go camping overnight?
What do the underlined words “pack out what you pack in” in Paragraph 4 probably mean?
Why were some deer killed on purpose at Grand Canyon?
Which of the following statements is true according to the passage?
What is the main purpose of the passage?
Doctors have long known that men and women experience their blues differently. Yet when doctors designed the guidebook they use to diagnose (诊断) psychiatric diseases, they made the descriptions gender-neutral. Today, evidence is mounting that in turning a blind eye to gender, they are actually doing their patients a disservice. As more researchers investigate sex differences in depression, the inescapable conclusion is that gender influences every aspect of these disorders.
More recently, researchers have started to study the deeper differences. Perhaps the most important of these, and the one most frequently misunderstood by people of both genders, is the difference in symptoms expressed by women and men. For women, the primary emotion of depression is usually sadness. For men, it is more typically anger or irritability, often coupled with recklessness (不顾一切). As a result, many women and men, including depressed men, mistake male depression for general frustration and restlessness rather than a serious disorder. Depressed men are also much less likely to seek help than depressed women, and they are much more likely to hurt themselves.
The big question is whether the differences are a matter of nature or nurture (后天养育). Some researchers believe the brain chemistry of depression is the same in men and women but that social standards do not let men express sadness, so they often have difficulty clearly expressing their symptoms. “They’ll say, ‘I’m not getting as much done,’ or ‘I keep getting into fights with my girlfriend,’ rather than ‘I’m sad,’” says Sam Cochran, director of counseling at the University of Iowa. “But once we get past that, the symptoms are pretty much the same as for the female patients.”
Cochran and others who emphasize the importance of cultural influences are increasingly in the minority. An ever growing body of evidence suggests that biology sets men and women apart in ways that have real consequences for mood and behavior. Not surprisingly, these differences emerge from the very substances that define gender in the first place: sex hormones (激素).
Understanding the effects of these hormones on the brain may be the only way to make sure that every depressed patient gets the right treatment. The biochemistry of sex hormones in the brain, however, is difficult to study because the hormones themselves are hard to measure and their effects are so widespread. But the evidence is strong for a primary role in gross brain physiology. The male brain tends to be larger than the female brain and matures more slowly.
What did the author say of the action of describing the symptoms gender-neutral?
According to the passage, when it comes to depression, men _______.
For those believing in nurture theory, men would have these responses because _______.
Which of the following is TRUE according to the last two paragraphs?
Which of the following might be the best title of the passage?