第26题: [单项选择]-- Have you ______ some new ideas -- Yeah. I'll tell you later.
A. come about B. come into C. come up with D. come out with 参考答案:C 答案解析:考查固定搭配。come about是“产生”;come into是“得到,获得”;come up with是“想出”;come out with是“说出,发表”。
第29题: [单项选择]By the end of this century, business ______greatly. A. (A) will be changed B. (B) will have changed C. (C) changes D. (D) changed 参考答案:B 答案解析:Future perfect tense indicates a future action that will occur before another future action. Choice
第33题: [单项选择]关于房室结双径路引发的心电图表现的表述,不正确的是() A. 发生折返性心动过速时RP′间期可<70ms B. 室性期前收缩通常不易诱发快慢型房室结折返性心动过速 C. 心房激动可分别沿房室结快慢径路下传形成1:2房室传导 D. 二条房室结慢径路可交替顺传引起慢快型房室结折返性心动过速 E. RP′间期可大于P′R间期 参考答案:B 答案解析:大多数快慢型房室结折返性心动过速常由室性期前收缩诱发。因为快径路的逆向不应期一般长于慢径路的不应期,室性期前收缩容易在快径路阻滞后沿不应期较短的慢径路缓慢逆转,再沿快径路顺传诱发出快慢型折返性心动过速