75.一個 16K×1 DRAM 有 128 列（row）需要在 2 ms 之內更新（refreshing）完畢，請問相鄰兩列的更新時間間隔不得大於多少時間？ (A) 7.812 μs (B) 15.625 μs (C) 31.250 μs (D) 62.500 μs

(1.1) Let L [·] denotes the Laplace transform. (A) The Laplace transform is a linear operation. (B) If L[F(t)] = F(s), then L[t2F(t)]= F(S)(C) If L[f(t)] = F(s) , then L = SF(s) - f(0). (D) If L[f(t)] = F(s) and L[g(t)] = G(s), then L[f* g(t)] = F(s)G(s), where * denotes the convolution integral. (E) All of the above statements are TRUE.