营养素A对人体长高有促进作用() ["A、只要多吃A就能长高","B、只有多吃A才能长高","C、多吃A未必能长高","D、A对人体只有好处"]
蛔虫感染人体的主要途径是() ["经皮肤","经口","经呼吸道","经媒介昆虫叮咬"]
人体感染肺吸虫有可能是因为() ["喝溪水,吃溪蟹、淡水鱼","吃淡水虾、荸荠,喝生水","喝溪水,吃海蟹、川卷螺","吃溪蟹和蝲蛄,喝溪水"]
地核的特点?
在人体肝胆管内寄生的寄生虫是() ["丝虫","旋毛虫","华支睾吸虫","钩虫"]
板块构造学说基本观点?