问题
多选题
眼球中的角膜、房水、晶状体、玻璃体等结构必须共同具有____特点，才可能使落在视网膜上的物像真实而清晰 [ ]
A．无色
B．有色素
C．透明
D．有弹性
答案
AC
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眼球中的角膜、房水、晶状体、玻璃体等结构必须共同具有____特点，才可能使落在视网膜上的物像真实而清晰 [ ]
A．无色
B．有色素
C．透明
D．有弹性
AC
| 阅读理解。 | ||
| ||
| 1. Which of the following information about the plane Lowcarbon is NOT true? | ||
[ ] | ||
| A. It can fly at 70 km an hour. B. It is solar -powered. C. It has passed a night-flight test. D. It is slower than a car. | ||
| 2. Lowcarbon is a special plane because ______. | ||
[ ] | ||
| A. it's made in Switzerlland B. it has travelled around the world C. it can do turns in the sky D. it's big and light, but uses little enegy | ||
| 3. The purpose of the second article is to ______. | ||
[ ] | ||
| A. encourage us to visit Shanghai Expo B. ask us to be volunteers for Shanghai Expo C. invite us to write stories about Shanghai Expo D. tell us to get the lucky prize of Shanghai Expo | ||
| 4. Your stories about the 2010 Shanghai Expo for China Daily ______. | ||
[ ] | ||
| A. can be in Chinese B. don't need to have photos C. must be given by post D. should be handed in by e-mail |