普通话中的声母和辅音有何不同？韵母和元音有何不同？

下列各项中，有关消费税的纳税地点正确的有()

A、纳税人进口应税消费品在纳税人机构所在地缴纳消费税

B、纳税人自产自用应税消费品在纳税人核算地缴纳消费税

C、纳税人委托加工应税消费品一般回委托方所在地缴纳消费税

D、纳税人到外县销售自产应税消费品应回核算地或所在地缴纳消费税

元素周期律和周期表是学习化学的重要工具，下表是元素周期表的部分信息。

请认真分析表中信息，回答下列问题：

(1) 地壳中含量最多元素的名称是________，该元素原子的质子数为_________

(2) 从表中查出镁(Mg)元素的相对原子质量为_________；

(3) 请写出图中x与y的值: x= ________，y=________

(4) 表中不同种元素最本质的区别是________ (填序号)：

A ．质子数不同 B．中子数不同 C．相对原子质量不同

(5)序号为11. 17的元素的原子结构示意图如图所示，试根据规律，在右边画出序号为12的元素的原子结构示意图_____________。

小儿适于擦浴和淋浴的年龄分别是（）

A.2～3个月，>2岁

B.5～6个月，>2岁

C.5～6个月，>3岁

D.7～8个月，>2岁

E.9～10个月，>3岁

阅读理解

     Few of us make money by losing sleep.But three graduate students at Brown University in

Providence built a company around sleep deprivation.

     Jason Donahue, Ben Rubin and Eric Shashoua were working late nights in Brown's business

and engineering schools-and began thinking about ways to sleep better.

     They discovered they weren't alone in burning the midnight oil.Around 20% of Americans get

less than six hours of rest a night.

     The friends imagined a smart alarm clock that could track how much time we spend in the most

restorative(促使康复的) stages of the sleep cycle:REM(快速眼动) and deep sleep.What would it

cost to design such a thing?Five years of research,20 employees, $ 14 million in funding and a whole

lot of doubting from investors and scientists.

     The company, Zeo, based in Newton, Mass., launched its product in June.The Zeo device uses

a headband with tiny sensors(传感器) that scan your brain for signs of four sleep states:REM, light,

deep and waking sleep.The smart alarm clock displays a graph of your sleep pattern and wakes you

as you're transitioning out of REM sleep (which is when you're least sleepy). In the morning you can

upload the data to the company's website, and so track your sleep over time.The cost, $ 399, includes

six months' access to one of Zeo's online sleep coaches.Most of the feedback comes in the form of

Zeo's ZQ score showing how well you've slept.

     "Zeo allows people to unlock this black box of sleep, "says Dave Dickinson, a healthcare CEO.

Whether any of this actually improves sleep is up to the consumer, who will also need to make lifestyle

changes like cutting out alcohol before bedtime or caffeine after 3 p. m..

      For now the company is selling Zeo online only.Dickinson also plans to expand to countries such as

Australia, where sleep deprivation approaches US levels.

1. Why did the three students imagine a smart alarm clock?

A. To earn enough money for a scholarship.

B. To wake them up on time in the morning.

C. To record the length of their sleep time.

D. To improve the quality of their sleep.

2. Which of the following is TRUE according to the passage?

A. It took 14 employees five years to develop the product.

B. Their research received a lot of support from investors.

C. About one in five Americans suffers from poor sleep.

D. Alcohol or caffeine before bedtime affects sleep.

3. Which is the correct order of how the Zeo device works?

a. wake you when you're least sleepy

b. scan your brain for sleep signs

c. get the Zeo's ZQ score

d. show a graph of your sleep pattern

e. upload the data to the company's website

A. d, b, a, e, c       

B. b, a, d, c, e

C. d, b, a, c, e  

D. b, d, a, e, c

4. The Zeo's ZQ score is connected with________.

A. the quality of sleep  

B. the length of sleep

C. the time of waking up 

D. the time of going to bed

5. From the passage we can learn that________.

A. Zeo will have a direct effect on users' lifestyles

B. Zeo will have better results if users make proper changes

C. Zeo is reported to be well received in Australia

D. Zeo can now be bought either in stores or online

下列关于医学知识的说法不正确的是（）

A．肝脏的主要功能之一是分解排除血液中的毒素

B．放疗中要使用放射线进行照射

C．砒霜在中药里可以入药

D．针灸中的“灸”是指用针扎刺人体穴位