Read the passage below carefully, and then choose the best answer:
A World without Wires
We are lucky to live in a world that is full of incredible technology. Our living rooms are packed with computers, LCD TVs, video game systems, and Blue-ray players that help us enjoy the latest entertainment. Although these items bring us joy and convenience, they also create a lot of clutter. Each device needs its own plug and adaptor to keep its batteries recharged, and over time these wires get _tangled_. Thankfully, something has come along to help get rid our homes of this mess while still supplying these devices with the power they need. It’s called wireless charging and this trend is just starting. Wireless charging, also known as inductive charging, has a lot of potential for smartphones and other electronic devices. Coils are used to create a magnetic field. Electronic devices can then absorb the electricity once they are placed on a special charging pad. There are several advantages that wireless charging offers over traditional methods. For starters, cords have a tendency to wear out with use. Wireless charging eliminates this hassle so users never have to worry about buying replacement cords. Wireless charging is also far more convenient for medical implants, as patients won’t need to recharge their devices through the skin using cords. In turn, this cuts down on the risks of infection. Wireless charging can also bring safety benefits, as wired charging devices that come in contact with water can increase the chances of getting an electric shock. Wireless charging eliminates that danger completely. Still, there are a few drawbacks to wireless charging. The first is speed. It takes a bit longer to charge devices wirelessly than it does if the device is plugged in. The process also requires more heat, so devices tend to get a bit hotter, which could create other safety issues. Also, since devices must be left on a special pad while charging, it is harder to operate them while they are powering up. This limitation may be eliminated in the future, as researchers are developing transmitters that can charge several different devices in a room without the need to connect to a charging pad. Although wireless-charging technology may be far from perfect, it seems like a step in the right direction as we move towards a less-tangled future.
7. The word “_tangled_” in paragraph 1 is closest in meaning to _________
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Lời giải:
Báo saiGiải thích: “Tangled” có nghĩa là “rối”, “lộn xộn”, đồng nghĩa với “messy”.
Tạm dịch: Mỗi thiết bị cần một phích cắm và bộ chỉnh lưu riêng để giữ cho pin được nạp lại, và theo thời gian các dây này bị rối.