31.B 推理判断题。根据These programs are expected to move beyond smartphones, into televisions, cars and living rooms,可知，人们期待这些程序出了智能手机之外，也能应用在电视，汽车，起居室等地，所以目前是主要应用在智能手机上，故选B。

　　考点：考查类阅读

　　【名师点睛】

　　【山东省潍坊中学2017届高三上学期开学考试】D

　　Sunscreens (防晒霜) can offer protection from two types of ultraviolet (UV) rays: UVB, which according to the Skin Cancer Foundation, are the chief cause of sunburn and play a key role in the development of skin cancer, and UVA, which get through the skin more deeply and are largely responsible for skin aging and wrinkling, as well as skin cancer risk. The SPF (防晒指数) measurement on sunscreens refers to the UVB protection level — and the number may not mean what you think it does. SPF 15 doesn’t protect you from 15% of UVB rays, just as SPF 100 doesn’t protect you from 100% of the rays. In fact, as you get into the higher numbered SPF sunscreens (think: 50 and above), the difference in UVB protection is actually pretty small.

　　Theoretically, though the increase in UVB protection with a super-high SPF sunscreen may be not worth considering, it may help, and certainly can’t hurt, to use it — that is, as long as you do so correctly. “The only downside is whether you’re giving yourself a sense of false security,” Dr. Gohara says.

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