工业区与居住区的一般布置原则有( )。A．工业区位于盛行风向的下风向 B．工业区位

质量为2kg的物体静止在足够大的水平面上，物体与地面间的动摩擦因数为0.2，最大静摩擦力和滑动摩擦力大小视为相等．从t=0时刻开始，物体受到方向不变、大小呈周期性变化的水平拉力F的作用，F随时间t的变化规律如图所示．重力加速度g取10m/s²，则（　　）

A．物体在t=0到t=3s这段时间内做匀速运动

B．物体在t=3s到t=6s这段时间内的位移大小为9m

C．物体在t=9s时的速度为12m/s

D．物体在t=0到t=12s这段时间内的位移大小为54m

阅读理解.

     "If you talk to the plants, they will grow faster and the effect is even better if you're a

woman." Researchers at Royal Horticultural Society carried out an experiment to find

that the voice of a woman gardener makes plants grow faster.

     The experiment lasted a month and by the end of the study scientists managed to

discover that tomato plants grew up two inches taller when women gardeners talked to

them instead of male.

     Sarah Darwin was the one making the plants registered the best growth. Her voice

was the most "inspiring" for plants than those of nine other gardeners when reading a

passage from The Origin of Species. The great-great-granddaughter of the famous

botanist Charles Darwin found that her plant grew about two inches taller than the plant

of the best male gardener.

     Colin Crosbie, Garden Superintendent at RHS, said that the finding cannot yet be

explained. He assumes that women have a greater range of pitch and tone which might

have a certain effect on the sound waves that reach the plant. "Sound waves are an

environmental effect just like rain or light ,"said Mr Grosbie.

     The study began in April at RHS Garden Wisley in Survey. Scientists started with

open auditions(听力) for the people who were asked to record passages from John

Wyndham's The Day of the Triffids, Shakespeare's A Midsummer's Night Dream and

Darwin's The Origin of Species.

     Afterwards researchers selected a number of different voices and played them to

10 tomato plants during a period of a month. Each plant had headphones connected to

it. Through the headphones the sound waves could hit the plants. It was discovered that

plants that "listened" to female voices on average grew taller by an inch in comparison to

plants that heard male voices.

     Miss Darwin said, "I think it is an honor to have a voice that can make tomatoes

grow, and especially fitting because for a number of years I have been studying wild

tomatoes from the Galapagos Island at the Natural History Museum in London."

1．What does the passage talk about?

A. Plants enjoy men's voices than women's.

B. A botanical experiment in a museum.

C. Voice's influence on plant growing.

D. Strange phenomenon at Royal Horticultural Society.

2．What does the underlined sentence in paragraph 4 mean?

A. Plants need sound as well as rain and light.

B. Sound is basic for the plant to grow.

C. Sound has a good effect as rain or light does.

D. Plants can't live without sound, rain or light.

3．Sarah Darwin is most likely a (an)_____.

A. botanist

B. gardener

C. astronomer

D. environmentalist

4．What can we learn from the passage?

A. The experiment ended in May.

B. Scientist can explain the findings clearly.

C. Plants enjoy listening to the passages from masterpieces.

D. The findings are of great importance to human beings.

朱砂安神丸的功用特点是（）

A．镇心安神

B．泻火养阴

C．两者均是

D．两者均非

( )是税收首要和基本职能。

A．财政职能
B．社会职能
C．公益职能
D．分配职能

2013年7月6日中国经济网：“在法国人眼中，中国文明的象征是动态的，两千年前是丝绸，一千年前是瓷器，五百年前是茶叶。”该信息表明（）

①中国自然经济长期未能突破

②古代中国手工业水平世界领先

③古代中国对外贸易长期入超

④东西方贸易交流不断

A.①②③

B.②③④

C.①②④

D.①③④