Early excitement about the next generation of the iPhone is building months ahead of an expected autumn debut(問世). Analysts expect Apple to release three iPhones this year, but the one getting the most attention is a rumored super-premium model to celebrate the iPhone's tenth anniversary. And, for that phone, Apple is expected to change the type of screen the iPhone uses.

Here's a quick look at what you need to know about what it means if Apple switches from its current liquid crystal display (LCD) screens to a type of organic light-emitting diode (OLED) screen called AMOLED.

The essential difference between an LCD screen and an AMOLED one is the presence of a backlight. Thanks to that difference, AMOLED screens can be very thin, which means you can make thinner products. They also provide more vivid colors, which is a reason that television makers have been pushing OLED in its various forms for their big screens. AMOLED screens, in particular, boast(夸口) even greater control over each individual pixel （像素）— which means better contrast for the viewer. These screens can also improve battery life. Because there's no backlight, AMOLED screens can be more energy-efficient when the user is viewing darker subjects, allowing the phone to shut off pixels and stop drawing power.

So why hasn't Apple switched to AMOLED yet? After all, Apple competitors such as Samsung and LG already have these screens on their smartphones.

AMOLED screens are not cheap to produce. It's also not that easy to make the complex AMOLED screens, which could explain why most Apple fans expect that only the highest-end phone will have the new screen.

And then there's the cost. The switch to AMOLED has also been cited as a reason that the price of the high-end iPhone may jump above the $1,000 mark. Beauty, even in a mass-produced world, does not come cheap.

Still, the expense may be worth it, especially as people shoot more photos and videos.

1.According to the passage, when will the iPhone’s tenth anniversary most probably be held?

A. In June.

B. In March.

C. In November.

D. In January.

2.According to most Apple fans, AMOLED screens will only be used on ________ this year.

A. the cheapest iPhones

B. the most massive iPhones

C. the highest iPhones

D. the most expensive iPhones

3.What does the underlined sentence indicate?

A. It is very expensive to become beautiful.

B. Everything has a price.

C. The more you pay, the more beautiful you will become.

D. Practice more, and you will become better.

4.What’s the author’s attitude towards the expected iPhone?

A. Negative.

B. Critical.

C. Positive.

D. Uninterested.

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