第23题: [单项选择]Which of the following was seen as a disadvantage of the postage stamp A. It had to be purchased by the sender in advance. B. It increased the cost of mail delivery. C. It was difficult to affix to letters. D. It was easy to counterfeit. 参考答案:A 答案解析:句子理解题。以下哪一项被视为邮票的不利之处 A项它必须被发信的人提前购买。B项它增加了信件传递的成本。C项它很难附在信件上。D项它很容易被伪造。
第24题: [单项选择]胃癌最常发生的转移途径是 A. 直接蔓延 B. 血道转移 C. 种植转移 D. 淋巴道转移 E. 沿肠管转移 参考答案:D 答案解析:[解析] 淋巴道转移是胃癌的主要转移途径,早期胃癌的淋巴道转移率近20%,进展期胃癌的淋巴道转移率高达70%。