搜题请搜索小程序“爱下问搜题”
问题 单项选择题

以下关于胃食管反流病的发病机制，不正确的是

A．下食管括约肌压力低下
B．与胃酸分泌无关
C．食管容量清除能力下降
D．食管静脉曲张
E．食管裂孔疝可引起胃食管反流病

答案

参考答案：D

完形填空

Hello, my friends!

I am Jerry. I am fifteen years old now. I am in Grade Nine in Eyer Middle School in Canada. I like watching movies on小题1:       (周末). My favorite color is小题2:     (绿色). And I enjoy traveling because I can see beautiful sights and meet different people. I have visited China小题3:   （两次）. How is it in China now? Do you get a lot of小题4:    (雪) this winter? We have it小题5:   (几乎)every week in Canada. So sometimes I am小题6:      (迟到) for school. It may小题7:    (听起来) terrible, right? I am waiting for spring to come! It seems to begin to get小题8:     (温暖), but there are still yellow小题9:     (树叶) in my garden. I hope spring comes soon. When flowers come out , I will go outside with my小题10:      (哥哥) and his friends. How about you ? What are you going to do in spring ?

Jerry
查看答案
判断题

长周期交易策略主要是应用在农产品的季节性上，相对而言，农产品的季节性因素非常明显。
查看答案