(Red and green) light, (if mixing) (in) the right proportion, (will give) us yellow.
A: Red and green
B: if mixing
C: in
D: will give
A: Red and green
B: if mixing
C: in
D: will give
举一反三
- (Red and green) light, (if mixing) (in) the right proportion, (will give) us yellow. A: A B: B C: C D: D
- (White and black) light, (if mixing) (in) the right proportion, (will show) us grey. A: White and black B: if mixing C: in D: will show
- What are the traditional colors of Christmas? A: Black, red and white B: White, yellow and green C: Red, green and white. D: Green, yellow and red
- Which are the colours of life-saving appliances? A: Orange, green or yellow. B: Orange, red or yellow. C: Orange, blue or green. D: Orange, yellow or green.
- If the red object is illuminated with green light it appears<br/>________. A: black B: red C: green D: white