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  1. ... grass cut short and even activities for the bowling green and putting green ------We learnt the protection of the green environment. We ...

  2. ...lens, d = (m - 1/2)(550 X 10^-9)/2(1.25) = 2.2 X 10^-7(m - 1/2) Put m = 1, d = 1.1 X 10^-7 m Put m = 2, d = 3.3 X 10^-7 m...

  3. 1. (b) (a) P(Red) = P(RRR) + P(RBR) + P(BRR) + (BBR) = 7/12 x 6/10 x 7/12 + 7/12 x 4/10 x 6/12 + 5/12 x 5/10 x 8/12 + 5/12 x 5/10 x 7/12 =93/160 P(Blue) = 1 - 93/160 = 67/160 2. a) 5/11 x 4/10 =2/11 b) P(WW) +P(GG...

  4. ...reduce the amount of pollution in the air that many people may not be aware of is to put plants in your home that naturally clean the air. Plants ...

  5. ...increasingly concerned that the booming trade in seahorses is putting the creatures at risk.