题干

如图,在△ABC中,AC=4,BC=2,点D是边AB上一点,CD将△ABC分成△ACD和△BCD,若△ACD是以AC为底的等腰三角形,且△BCD与△BAC相似,则CD的长为(   )

A:1712

B:2

C:4 2 ﹣4

D:433

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答案(点此获取答案解析)

D

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阅读下列短文,从每题所给的四个选项 (A 、B 、C  和 D )中 ,选出最佳选项。

    A Hong Kong Disneyland park admission ticket is your passport to a full day of magical adventures. Learn the ways to buy your tickets now.

    Three types of 1-day ticket are available:

Ticket Type

Price

General Admission Ticket (aged 12—64)

HK $ 499

Child Ticket (aged 3----11)

HK $ 355

Senior Ticket (aged 65 or above)

HK $ 100

    Free admission for Child aged under 3.

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    Purchase tickets conveniently through our website, then pick up your tickets starting from 1 hour after you have purchased online.

    Purchase Tickets Directly at Hong Kong Disneyland Ticket Express

    You can purchase tickets at the Hong Kong Disneyland Ticket Express, conveniently located at the MTR Hong Kong Station. Open from 9:00 am ---- 8:00 pm on Mondays to Fridays and from 9:00 am ---- 5:00 pm on Saturdays, Sundays and Public Holidays.

    Purchase 2 Park Tickets at one of the following locations and receive a FREE limited-edition Disney gift:

    ★ Avenue of Stars Kiosks

    You can purchase tickets at Avenue of Stars Kiosks in Tsim Sha Tsui. Open daily from 9:00 am ----10:30 pm.

    ★ Asia World-Expo Box Office

    You can purchase tickets at Asia World-Expo Box Office. Open Mondays to Fridays from 10:00 am ---- 6:00 pm.

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    As a hotel Guest of Hong Kong Disneyland Hotel or Disney’s Hollywood Hotel, Park tickets are reserved for your purchase at front desk. Open daily from 9:00 am ---- 8:00 pm.

    Buy at Hong Kong Disneyland Main Entrance

    Guests can purchase tickets on the day of their visit at the Main Entrance Ticket Booths or Guest Relations Windows. Open daily from 30 minutes before Park opening until Park closes.