COLOR BLINDEDNESS Are you color blind?

在PUBMED数据库中检索有关色盲的文献，以下哪个检索式不正确（） A: color and blind B: （color or colour）and blind C: colo？r and blind D: colour and blind

Are you color blind? A: Yes B: No

In<br/>human populatin, there is one man who is red green color blind in 12<br/>men. What is the ratio of red green color blind in women? ( ) A: 1/12 B: 11/12 C: 1/144 D: 11/72

1. A normal couple has a color-blind son. Where does the color-blind gene of the sone from? A: Father B: Mother C: Half of both father and mother D: Either father or mother

When the blind man ate as much as the narrator and his wife did, the narrator thought A: The blind man was a big eater. B: The wife cooked a special dinner for the blind man. C: The blind man was as normal as him. D: The blind man was hungry after a long trip.

As blind as a ______ .

Look for its blind spot. Every dragon has one. 句中 blind spot 是表示（ ）。

Color-blind people often find it difficult to ___________ between red and green. A: identify B: distinguish C: separate D: compare

Whatis a blind hole?