题型:阅读理解 题类:常考题 难易度:普通
福建省闽侯第四中学2019届高三上学期英语开学考试试卷
A research project jointly carried out by scientists from several British universities and institutes has drawn people's attention to the toothbrush again.
Researchers have found that your toothbrush is home to more than 100 million bacteria. But there are hundreds of microorganisms in the mouths and your toothbrush probably won't make you sick unless there is an unhealthy balance of bacteria. Our immune system can usually take care of bacterial invaders. However, if others use your toothbrush, or you use someone else's, bacteria can be spread.
They have also found the toothbrush holders are the third-most dirty household items (behind dish sponges and kitchen sinks), thus advocating cleaning the toothbrush holder regularly.
The storage of your toothbrush in your bathroom is also important. Here are some storage tips from the researchers to keep your toothbrush as healthy as possible:
Put your toothbrush as far away as possible from the toilet flushing.
Let your toothbrush dry thoroughly between brushings.
Don't use toothbrush covers, which can create a perfect breeding ground for bacteria.
Keep your toothbrush upright in a holder rather than lying down.
Keep toothbrushes separate. If toothbrushes touch, they can exchange and spread bacteria.
There are products available that claim to sanitize(消毒)your toothbrush. While some of these products do kill some bacteria, there is no evidence that using them will reduce your risk of illness, according to the researchers.
They recommend replacing your toothbrush every three to four months or more often if you are sick or if you have a weakened immune system. Children's toothbrushes may need to be replaced more often than adult brushes.
There's so much to see and do in the coolest little capital. Here's our list of the top 5 must dos when you visit Wellington.
| Enjoy 360° views from the top of Mount Victoria Get a full view of the city and a great photo at the Mount Victoria Lookout. Watch the ships sailing in and plane taking off from Wellington Airport. |
| Ride the historic Wellington Cable Car The Cable Car is a Wellington mark. It runs from Lambton Quay up to Kelburn. At its top, there's a lookout, the Cable Car Museum, and Space Place at Carter Observatory. |
| Check out our world famous movie-making magic Get into the imagination and the skills of artists behind some of the world's most wonderful movies at the Weta Cave mini-museum, where you can find yourself in the world of the movie— The Lord of the Rings. |
| Have a close touch at Wellington Zoo Do you want to hand-feed a giraffe, play with a group of meerkats (猫鼬) or touch a cheetah's (猜豹) fur? All are possible at Wellington Zoo, the best little zoo in the world. |
| Discover our stories at Te Papa The national museum of New Zealand, Te Papa, is fascinating and fun for any age. The exhibits (展览) tell stories about each side of New Zealand in new and exciting ways. By the way, you can enter the Te papa museum for free. |
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