题干

如图所示,投影仪是教学中常用的设备,下面关于投影仪的叙述中不正确的是(  )


A:平面镜的作用是改变光的传播方向

B:屏幕表面粗糙,有利于光发生漫反射

C:物体在屏幕上所成的像是一个放大的虚像

D:若使屏幕上的像变大,应使镜头靠近投影片

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答案(点此获取答案解析)

C

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HOLIDAY FUN AT THE POWERHOUSE

500 HARRIS STREET ULTIMO·TELEPHONE

( 02 ) 9217 0111

    Join in the holiday fun at the Powerhouse this month linked to our new exhibition, Evolution & Revolution: Chinese dress 1700s to now. DON'T FORGET our other special event, the Club Med Circus School which is part of the Circus(马戏团)!150 years  of circus in Australia exhibition experience!

◆Chinese Folk Dancing: Colourful Chinese dance and musical performances by The Chinese Folk Dancing School of Sydney. Dances include: the Golden stick dance and the Chinese drum dance. A feature will be the Qin Dynasty Emperor's court dance. Also included is a show of face painting for Beijing opera performances.

    Sunday 29 June and Wednesday 2 July in the Turbine Hall, at 11:30 am & 1:30 pm.

◆Australian Chinese Children's Arts Theatre: Well­known children's play experts from Shanghai lead this dynamic youth group. Performances include Chinese fairy tales and plays.

    Thursday 3 to Sunday 6 July in the Turbine Hall, at 11:30 am & 1:30 pm.

◆Chinese Youth League: A traditional performing arts group featuring performance highlights such as Red scarf and Spring flower dances, and a musician playing Er Hu.

    Sunday 6 to Tuesday 8 July in the Turbine Hall, 11:30 am to 1:30 pm.

◆Kids Activity: Make a Paper Horse: Young children make a paper horse cut­out. (The horse is a frequent theme in Chinese painting, indicating a kind of advancement.) Suitable for ages 8~12 years.

    Saturday 28 June to Tuesday 8 July in the Turbine Hall, 12:00 pm to 1:00 pm.

◆Club Med Circus School: Learn circus skills, including the trapeze, trampolining and magic. Note only for children over 5. There are 40 places available in each 1 hour session and these must be booked at the front desk, level 4, on the day.

Tuesday 1 to Saturday 5 July at 11:30 am & 1:00 pm.

    Enjoy unlimited free visits and many other benefits by becoming a family member of the Powerhouse. Our family memberships cover two adults and all children under the age of 16 years at the one address.

    Members receive Powerline, our monthly magazine, discounts in the shops and the restaurants, as well as free admission to the Museum. All this for as little as $50.00 a year! Call (02)9217 0600 for more details.