引起真菌感染的常见致病菌是（） A.曲霉菌 B.光滑念珠菌 C.白色念珠菌 D.热带

阅读短文，根据其内问题。

     Today is the Earth Day. Our reporter Nick Ford interviewed several people in the street. This is what they

told him:

     9:24 Miss Mayfield, a young teacher

     I try to tell my students the importance of our relations with wild animals. I take them to zoos and forests,

and I avoid using materials that come from wild animals, for example, ivory, which comes from elephants. I

don't wear things made of fur, and I even avoid buying leather shoes. Wool is okay, though-the sheep don't

get hurt!

     10:03 Mr. Perdue, a businessman

     I don't use my car for short journeys. I walk or go by bike. It's good for my health, and it doesn't pollute

the air.

     10:30 Tom Pitt, a 14-year-old student

     I only buy writing paper and notebooks made from recycled paper. And when I buy something made of

wood, like a wooden table, I'll make sure that the wood comes from a forest where they plant new trees.

     11:01 Mr. White, an artist

     I'm an artist, and I enjoy recycled art. They are things made out of rubbishlike this model plane made from

old containers. In fact, I hate throwing things away. I even keep my old woolen clothes and cotton

handkerchiefs and use them for cleaning.

     11:35 Ms Nelson, a policewoman

     I'm careful not to waste electricity. For example, I always turn the lights off when I leave a room. And I

don't have the TV on when I' m not watching it.

     12:00 Mr. Parks, a doctor

     I take my empty bottles, jars, and anything else made of glass to the recycling center, every week. I try

not to buy plastic bottles because you can't recycle most kinds of plastic.

1. Is Miss Mayfield a young teacher?

    __________________________________________

2. Who doesn't use a car for short journeys? 

    __________________________________________

3. Where does Mr. Parks go every week? 

    __________________________________________

4. What is recycled art?

    __________________________________________

5. What are these people trying to do? 

    __________________________________________

下列关于加工取得所有权的表述正确的是：

A．甲购得一块木头制成椅子一把，可因加工获得椅子的所有权

B．甲将乙的一块玉石雕刻成一个精美而价值连城的玉佛，可因加工获得所有权

C．甲将朋友赠送的树根做成极具观赏价值的根雕，可因加工而获得根雕的所有权

D．甲将乙的桌子刷了一层油漆，则甲可以因加工获得桌子的所有权

小华探究杠杆平衡条件时，使用的每个钩码的质量均为50g，杠杆上相邻刻线间的距离相等。小华将杠杆调节水平平衡后，在杠杆上的B点悬挂了3个钩码，如图所示。为使杠杆保持水平平衡状态，应该在A点悬挂       个钩码。

曲线r=3cosθ，r=1+cosθ所围图形的公共部分面积A=______．

汽车走合500km左右时，发动机应在热状态下（）一次润滑油。