马克思主义哲学中国化的精髓是 A．《实践论》 B．《矛盾论》 C．科学技术是第

（2分）POS刷卡机的广泛应用给人们的生活带来了便利．POS机的刷卡位置有一个绕有线圈的小铁环制成的检测头（如图所示）．在使用时，将带有磁条的信用卡在POS机指定位置刷一下，检测头的线圈中就会产生变化的电流，POS机便可读出磁条上的信息．下图中能反映POS刷卡机读出信息原理的是（　　）

March 21 is World Sleep Day. How’s your sleep recently?

The Chinese Medical Doctor Association asked 8,200 people in China about their sleep. More than 36.3 percent of them said they often sleep badly. The study also finds that many students have only 5 hours of sleep a day. According to the US National Sleep Foundation, teenagers need 8.5 to 9 hours of sleep every night. What cuts into their sleeping time? Homework. Also, school starts early in the morning.

But bad sleeping habits also play a role. Do you like to have a look at your mobile phone before going to bed? The survey finds that 60 percent of people check their phones before they sleep. They read news, check their WeChat (微信) or chat with QQ friends.

It’s important for us to get enough sleep. We feel tired and think slowly. Besides, sleepy kids are often unhappy, says a study by the US National Sleep Foundation.

We can’t change our school time. But there are still ways to get better sleep. Stay away from coke, coffee and tea at night. They make it hard to fall asleep. Watch less television. Leave your mobile phone and tablet computer (平板电脑) on your desk.

根据短文内容，选择最佳答语，并在答题卡上按要求作答。

小题1:What cuts into students’ sleeping time?

A．Students like reading in bed before they sleep.

B．Students have got too much homework and school starts early in the morning..

C．Students often drink coke, coffee and tea at night.

D．Students check their WeChat or chat with QQ friends at night.小题2:How do students behave in class when they don’t get enough sleep?

A．They don’t want to do their homework.

B．They sleep in class.

C．They feel excited.

D．They not only feel tired and unhappy but also think slowly.小题3:How many hours should teenagers sleep every night according to the US National Sleep Foundation?

A．5 to 6 hours.

B．6 to 8 hours.

C．8.5 to 9 hours.

D．9 to 10 hours.小题4:Which of the following is NOT true?

A．Drinking coke, coffee and tea at night is good for our sleep.

B．We can’t change everything but we can find many ways to get better sleep.

C．Bad sleeping habits aren’t good for us.

D．We should stay away from bad sleeping habits.小题5:In this passage, the writer is mainly trying to make the readers realize__________.

A．March 21 is World Sleep Day

B．homework makes students have no enough time to sleep

C．we feel tired and think slowly because we have bad sleeping habits

D．good sleeping habits can help us stay healthy

某患儿，于胸骨左缘第3、4肋间闻及全收缩期杂音，超声诊断为膜部室间隔缺损。

膜部室间隔缺损的二维超声表现是（）。

A.左心室长轴切面室间隔上部中断

B.远离主动脉瓣的室间隔连续性中断

C.主动脉根部短轴切面右房室瓣隔瓣基底部至主动脉根部短轴12点处的室间隔连续性中断

D.主动脉根部短轴切面12点至肺动脉瓣之间室间隔连续性中断

E.心尖部室间隔连续性中断

备用气瓶的存放，采用专门设计的（）气瓶架。

A.平行式

B.倾斜式

C.垂直式

D.蜂格式

工业上应用的聚乙烯抗氧剂为：（）。催化剂主要是氧和过氧化物，目前后者为主，常用的有过氧化二叔丁基、过氧化十二烷酰、过氧化苯甲酸叔丁酯，过氧化3，5，5-三甲基乙酰等。