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Nowadays there seems to be an app for everything. And mobile apps have been a part of our life. The following apps are part of the most popular apps.
 Ctrip: It can be the best helper when you feel it hard to buy the train or airline tickets. You can buy tickets anywhere at anytime. |
 Ximalaya Reading: It has lots of books, including poems, short stories, novels and even fairy tales for children. We can download book recordings and listen to them. It has more than 1 million valuable resources( 资源). |
 Baby Bus: It is a very good friend for children under three years old. Kids can learn to speak and draw pictures with the help of this app. |
 World Heroes: It may help you learn more English words while you’re playing games, so if you have problems remembering the new words when you learn English, use it! |
1．Ctrip is a useful APP for _______.
| A．buying tickets | B．learning English | C．playing games |
| A．one million | B．over one million | C．less than one million |
| A．learn to speak | B．draw pictures | C．Both A and B |
| A．Ctrip | B．Ximalaya Reading | C．World Heroes |
| A．Introduction of mobile App for reading. |
| B．Introduction of some popular mobile apps. |
| C．Introduction of mobile apps for learning English. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
