1. How many people died in a landslide in 2003?
A.About two hundred. | B.Over one thousand. | C.About two thousand. |
A.Growing grass. | B.Cutting down trees. | C.Growing population. |
A.Growing more forests. |
B.Chopping down the old forests. |
C.Getting busy in protecting our country. |
1. What does Jacob ask Amy to do?
A.Enjoy the flowers. | B.Provide help. | C.Grow flowers. |
A.Every day. | B.Every two days. | C.Every three days. |
A.They lack water. | B.They lack sunshine. | C.Their leaves turn yellow. |
A.Water flowers in time. | B.Learn about growing flowers. | C.Grow flowers with Amy. |
1. What does Jacob ask Amy to do?
A.Enjoy the flowers. | B.Provide help. | C.Grow flowers. |
A.Every day. | B.Every two days. | C.Every three days. |
A.They lack water. | B.They lack sunshine. | C.Their leaves turn yellow. |
A.Water flowers in time. | B.Learn about growing flowers. | C.Grow flowers with Amy. |
1. How many people died in a landslide in 2003?
A.About two hundred. | B.Over one thousand. | C.About two thousand. |
A.Growing grass. | B.Cutting down trees. | C.Growing population. |
A.Growing more forests. |
B.Chopping down the old forests. |
C.Getting busy in protecting our country. |
5 . This is the time of year when many gardeners are harvesting tomatoes. Gardening expert Jessica Damiano recently reported about the many pictures of strangely shaped tomatoes sent to her from fans of her gardening advice.
Not every tomato on an affected plant will be deformed (改变形状), however. What are the possibilities? Under the right conditions (temperatures that are too hot or even too cold), this could affect one or two tomatoes per plant, depending on where they are in the development process and what the (weather) conditions are, said Timothy McDermott, a professor at Ohio State University. The possibility of one of your tomatoes developing a locule oddity (怪异) is about one in a thousand, McDermott said.
And, when harvesting your crop, remember:
A.select the good-looking ones. |
B.Any tomato can grow an extra locule. |
C.the funny-looking tomatoes taste just as good! |
D.What causes the unusual appearance of tomatoes? |
E.Unless otherwise diseased, they are perfectly good for eating. |
F.She said people sometimes question if the tomatoes are okay to eat. |
G.Provide shade for your plants when temperatures are predicted to remain above 32℃. |
6 . How to Care for Indoor Plants
If you’ve ever had an indoor plant that’s quickly withered (枯萎), you might believe that you don’t have a green thumb or you’re not cut out for growing plants.
Stick your finger in the soil to determine how wet it is below the surface. If you put your finger into the soil up to your joint, you can feel if your plant needs more water. If the soil feels damp, then you don’t need to water it.
Use water that is at room temperature. 68F or 20C is the best temperature to keep the water that you’re using to water your plants.
Use a hand-held moisture (水分) meter to ensure water levels in your soil.
A.Keep potting soil moist, but not wet. |
B.Indoor plants are not necessarily good for us. |
C.Well, we’re here to tell you that’s not the case. |
D.Test whether your finger is long enough to put into the soil. |
E.You can use a thermometer to determine the temperature of the water. |
F.Over-watering can lead to rotting of the root which you need to fix. |
G.Moisture meters are the most accurate way to determine how hydrated your plants are. |
7 . For many people, catching a smell of freshly cut grass is a pleasant sign that warmer weather is here to stay. For the grass, however, this scent signals an entirely different story.
The smell we associate with freshly cut grass is actually a chemical SOS, one used by plants to beg nearby creatures to save them from attack. After all, when danger strikes —whether it's gardening equipment or a hungry caterpillar — plants can't lift their roots and run. They must fight where they stand. To protect themselves, plants employ a string of molecular (分子) responses. These chemical communications can be used to poison an enemy, warn surrounding plants of dangers or attract helpful insects to perform needed services.
Clearly, plants can communicate. But does that mean they can feel pain? According to some researchers, plants release gases that are the equivalent of crying out in pain. Using a laser-powered microphone, researchers have picked up sound waves produced by plants releasing gases when cut or injured. Although not audible to the human ear, the secret voices of plants have revealed that cucumbers scream when they are sick, and flowers cry when their leaves are cut.
There's also evidence that plants can hear themselves being eaten. Researches show that plants understand and respond to chewing sounds made by caterpillars dining on them. As soon as the plants hear the noises, they respond with several defense mechanisms.
For some researchers, evidence of these complex communication systems — giving out noises via gas when in pain — signals that plants feel pain. Others argue that there cannot be pain without a brain to register the feeling. Still more scientists infer that plants can exhibit intelligent behavior without possessing a brain or conscious awareness.
As they grow, plants can change their paths to avoid obstacles or reach for support with their tendrils (卷须). This activity comes from a complex biological network distributed through the plants' roots, leaves and stems. This network helps plants reproduce, grow and survive.
1. What does the smell of freshly cut grass signal?A.Warmer weather. | B.Being poisonous. |
C.Cry for help. | D.The need of services. |
A.By giving out gases. | B.By changing the color of their leaves. |
C.By producing audible sound waves. | D.By sharing it through the root systems. |
A.Their tendrils. | B.Their biological network. |
C.Their communication systems. | D.Their conscious awareness. |
A.Do plants feel pain? | B.How plants protect themselves? |
C.Do plants communicate? | D.How plants grow and reproduce? |