全国信令网划分为23个主信令区,每个主信令区不得超过()个分信令区,每个分信令区不得超过()个信令点。
参考答案:256;256
Sometimes we buy a magazine with absolutely no purpose ___________ to pass time.
A.other that
B.rather than
C.as well
D.more than
可降低香豆素类抗凝作用的药物是()
A.阿司匹林
B.保泰松
C.氯贝丁酯
D.甲硝唑
E.苯妥英钠