美育是儿童了解、创造美好世界的源泉，家长应培养孩子（）。A．鉴赏美和感受美的能力 B

能引起周围血管收缩、局部缺血与出血的百日咳杆菌的致病物质是

A．百日咳毒素

B．腺苷环化酶毒素

C．气管细胞毒素

D．皮肤坏死毒素

E．内毒素

After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the day. The rest that you get while sleeping makes it possible for your body to prepare itself for the next day.

There are four levels of sleep, each being a little deeper than the one before. As you sleep, your body relaxes (放松) little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts (变换) back and forth from one level of sleep to the other.

Though your mind slows down, you will dream from time to time. Scientists who study sleep point out that when dreaming occurs, your eyeballs begin to move more quickly (although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.

If you have trouble falling asleep, some people recommend (建议) breathing very slowly and very deeply. Other people believe that drinking warm milk will make you drowsy. There is also an old suggestion that counting sheep will put you to sleep.

小题1:The text suggests that not getting enough sleep might make you _____.

A．suffer from poor health

B．feel tired and nervous

C．dream more often

D．breathe quickly小题2:During REM, _____.

A．you move restlessly

B．you start dreaming

C．your mind stops working

D．your eyeballs move quickly小题3:The underlined word "drowsy" in the last paragraph probably means _____.

A．lazy

B．sleepy

C．relaxed

D．pleased小题4:A good title for this text might be _____.

A．Dreams

B．Sleep

C．Good Health

D．Work and Rest

小学美育的任务是（）

A．提高学生对美的事物的感受能力

B．提高学生对事物美丑的识别能力

C．提高学生对美的事物的想象能力

D．提高学生的逻辑思维能力

E．提高学生对美的事物的创造能力

井田内从地面向地下布置和开掘水平巷道的工作叫（）。

国共第一次合作实现的标志是（）

A.国民党一大的召开

B.中共一大

C.辛亥革命

D.中共二大