第20题: [单项选择]We should never {{U}}content{{/U}} ourselves with only a little knowledge. A. convince B. satisfy C. comfort D. benefit 参考答案:B 答案解析:[解析] 根据句意“我们切不可……仅仅有一点点知识。”判断B“使满足”是答案。convince, vt.使确信,使信服;benefit,n.利益,好处vt.有益于,有助于;comfort,vt.安慰,
第27题:[多选题] Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.) A. amount of RAM B. bridge priority C. IOS version D. IP address E. MAC address F. speed of the links 参考答案:BE
STP在选举RB的时候依靠的事桥ID,桥ID包含两个部分组成一个是桥优先级另一部分就是桥mac
第28题: [单项选择]What happened to the man A. He failed in the maths exam. B. He got a very high score. C. He didn’t sleep last night. D. He had not enough sleep last night. 参考答案:B 答案解析:[听力原文] M: I got a full mark in my maths exam. W: That’s wonderful! You must be excited! M:
第29题: [简答题]直到昨天晚上他才改变了他的注意。 参考答案:
He didn’t change his mind until last night.
第30题: [单项选择]不属于细胞外液的是 A. 血浆 B. 组织液 C. 脑脊液 D. 唾液 E. 淋巴液 参考答案:E 答案解析:细胞外液由血浆、组织液、淋巴液和脑脊液等组成,而唾液不属于细胞外液。