第19题: [单项选择]Scientists are ______ certain that there is a cancer-inhibiting agent in the blood of the shark. A. dubiously B. virtually C. queerly D. randomly 参考答案:B 答案解析:[解析] B选项“virtually几乎,事实上,实际上”符合题意,如:The city was virtually paralyzed by the transit strike.(这个城市实际上已
第22题: [单项选择]淋病双球菌在体内传播途径为() A. 经体循环播散 B. 沿黏膜上行蔓延 C. 经淋巴系统蔓延 D. 直接种植 E. 经淋巴系统蔓延及直接蔓延 参考答案:B 答案解析:沿生殖道黏膜上行蔓延病原体由外阴侵入阴道,或阴道内的菌群沿黏膜上行,通过子宫颈、子宫内膜、输卵管内膜到达卵巢及腹腔。