Why do you think the Chinese kept silk production a secret

The Chinese kept silk production a secret because it was very important to their culture and economy for thousands of years.

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this

answer; first blank(1); 30% two(2); salmonella; i believe this is correct; //good luck;