简述内容分析法及其特点。

在测定小灯泡的功率”的实验中，小明所在的实验小组要测量一只额定电压为3.8V的小灯饱的功率．

（1）如图甲所示，为实验小组未完成的实物电路，请用笔画线代替导线完成实物电路的连接；并根据实物连接图，在上右虚线框中用规定的电路符号画出相应的电路图．

（2）连好电路后，闭合开关，电压表的示数为3V时电流表的示数为0.27A，小灯泡的实际功率为______W；调节滑动变阻器的滑片使小灯饱正常发光，电流表的指针位置如图乙所示，则小灯泡的额定功率为______W．

乳酶酸能分解糖类生成乳酸，使

A．胃内酸度升高

B．胃内酸度降低

C．肠内酸度降低

D．肠内酸度升高

E．不改变胃和肠内酸度

It's 10:30 pm, and 11-year-old Brandon Blanco is sound asleep at home. Suddenly, a loud noise wakes him up. Naturally, Brandon reaches for his cell phone. The message becomes clear: "R U awake?"

Brandon' s use of technology doesn' t stop there. He also has a computer, a TV and three video-game consoles (控制台 ) in his room. With so many choices, it' s no surprise that when he isn' t at school, he spends nearly every waking minute using one or more of these devices

Brandon is hardly alone. According to a recent study by the Kaiser Family Foundation, kids aged 8 to18 are spending more time than ever before using electronic devices. How much time? More than seven and a half hours a day on average, the study found.

The jump is the result of a huge explosion in mobile devices, says Victoria Rideout, the lead author of the study. Today, nearly seven out of ten kids have cell phones. Just five years ago, it was four out of ten.

Often, kids multitask, or use more than one device at a time. " If you’ve got a chance to do something on your computer and take a phone call and have the TV on in the background, why not?" media expert Cheryl Olson says.

Most experts agree technology has much to offer kids. But some worry the kids could be missing out on other activities like playing outside or hanging out with friends. " It' s a matter of balance," says Olson." You’ve got to work on it. "

Multitasking while doing homework is another concern. Some kids listen to music, watch TV or use the phone while doing their homework. "It' s important to make sure that you can stop and concentrate on one thing deeply, " says Rideout.

With new and exciting devices hitting stores every year, keeping technology use in check is more important than ever. " Kids should try," adds Rideout. " But parents might have to step in sometimes. "

小题1:Why do children spend more time in using electronic devices?

A．Because more electronic devices are available to them.

B．Because electronic devices are more exciting than before.

C．Because they have less other activities.

D．Because they have less homework to do.小题2:It is known from the passage that  ____.

A．Brandon Blanco feels very annoyed about his late-night text

B．the teenagers using mobile devices have increased by 30% in the past five years

C．Cheryl Olson is not surprised about kids' increasing use of mobile devices

D．most experts think teenagers should not use electronic devices for their studies小题3:Which of the following is an example of multitasking according to the passage?

A．Watching TV while using the computer.

B．Talking on the phone while staying with others.

C．Playing video games on the Internet.

D．Listening to music while relaxing.小题4:According to the passage, Victoria Rideout would probably agree that ____.

A．kids should do homework while surfing the Internet

B．kids should do homework in a place without disturbance

C．kids should spend more time on homework

D．kids should have more homework than before

有一则广告说“超纯净水、纯蒸馏水绝对卫生，长期饮用有益于健康。”你认为科学吗？

关于国内生产总值的说法错误的是( )

A．国内生产总值包括物质生产部门创造的价值和非物质生产部门创造的价值
B．实际国内生产总值按当时价格计算，而名义国民生产总值则按固定价格计算
C．国内生产总值可以反映一个国家在较长时期内的经济发展水平和发展速度
D．在分析一国经济发展水平时，宜采用按固定价格计算的国内生产总值指标