3. Which of the following statements about integers are incorrect?
(A) If gcd(a,b) = 1, then for any non-zero integer n, there is a pair of integers p
and a such that pa + qb = n.
(B) The inverse of p module q exists only when ged(p,q) = 1 and q > 1.
(x = a (mod m.)
(C) The system
has a unique solution modulo m, where m i are primes and=m1 m2...mn.
(D) Ifp is prime, then for every integer a we have ≡1(mod p).
(E) In RSA, if Alice wants to send a secret message to Bob, Alice uses Bob's
private key to encrypt the message and then send the ciphertext message to
Bob. After Bob receives the ciphertext, Bob can use his public key to decrypt
the ciphertext.
四、室內空氣溫度為 20℃,相對溼度φ= 40%,經加熱器加熱 400 W,流出
之溫度為 46℃,再經由風扇吹向溼的表面,使得空氣吸收表面水汽,沿
著絕熱過程至 21℃的飽和狀態,最後空氣流向房間的壁面,將空氣冷卻
至 20℃。其中空氣的 Cp = 1.005 kJ/kg℃,1 atm = 101 kPa。