—What language is that guy speaking? I can hardly catch a single word!
—              . He's from India, so I guess it is Hindi.

根据句意，写出括号内所给单词的适当形式。
____ We love our children and our parents love ______(they).
____ If giant pandas are in ______(dangerous), they will attack people.
____ ______(luck), he was not badly hurt in the car accident last month.
____ Thousands of ______ (tour) come to the Great Wall every year.
____ The places ______(mark) in red are very dangerous.

已知全集U={1，2，3，4，5}，集合A={1，2}，B={2，3}，则（∁_UA）∪B=（　　）

正常情况下人的胃液pH为0.8～1.5，相应含HCl的溶质质量分数为0.2%～0.4%，胃液中HCl过多与过少都不利于人体健康．某人出现反胃、吐酸水的症状，经检查其胃液中HCl的质量分数为1.49%（胃液密度约为1g/cm³）．

治疗白化病、苯丙酮尿症等人类遗传病的根本途径是（　　）