据消费者反映，在线订票时，携程网在消费者不知情的情况下，默认勾选航空保险、酒店优惠券等付费项目。中消协近日致函携程网，对有关消费者权益问题启动调查。下来说法正确的是（ ）
A：携程网侵犯了消费者知悉真情权、维护尊严权
B：消费者应立即向人民法院提起诉讼，依法维护自己合法权益
C：中消协是依法规范社会主义市场经济正常秩序的行为
D：携程网违背了诚信的原则，具有严重社会危害性
在代数式52x2-3x，2πx2y，1x，﹣5，a中，单项式的个数是（ ）
下列某部宪法规定：“总统在征得参议院同意后，有权解散众议院。”此部宪法是指
I am an English girl. My name is Mary. I’m twelve. My dad and mom are English teachers. I have a brother（哥哥）. His name is Tom and he is thirteen years old. We are in China now. We are in Beijing No. 4 Junior High School. Tom is in Class 4, Grade 7 and I am in Class 9, Grade 7. I have a dog. My dog looks strong. It has a big mouth and two big black ears. We have many(许多) Chinese friends here. They are good.
