第15题: [单项选择]为了解雌激素水平进行阴道脱落细胞检查,正确的取材部位是() A. 阴道下段前壁 B. 阴道中段后壁 C. 阴道中段前壁 D. 阴道上段侧壁 E. 阴道后穹隆 参考答案:D 答案解析:阴道上段黏膜对性激素最敏感,临床上检查阴道上1/3段阴道侧壁脱落细胞的变化,了解体内雌激素浓度和有无排卵。
第27题: [单项选择]If an auxiliary diesel engine frequently stalls, the trouble may be caused by () A. low exhaust back pressure B. air in the fuel system C. gasket blow-by or leakage D. incorrect assembly of idler springs 参考答案:B
第34题: [单项选择]The new communication system is by no means a (minute) invention. A. timely B. small C. accidental D. significant 参考答案:B 答案解析:可借助划线词的基本词义(分钟,片刻)和句意选择答案。by no means决不,一点也不;timely adj.及时的,适时的;accidental adj.偶然的,无意中的