支气管哮喘可出现的呼吸困难是()。 A.混合性呼吸困难 B.心源性呼吸困难 C.吸气 发布时间:2017-07-14 01:15 │ 来源:www.tikuol.com 题型:单项选择题 B1型题 问题: 支气管哮喘可出现的呼吸困难是()。A.混合性呼吸困难B.心源性呼吸困难C.吸气性呼吸困难D.呼气性呼吸困难E.中毒性呼吸困难
题型:单项选择题 B1型题 近两年来,一些城市的中学校园兴起了中学生出国留学热,Bill和Tom表达了各自不同的观点,你认为中学生到国外学习有利还是有弊呢?Bill1. foreign language environment2. learn to live by oneself3. widen one’s eyesTom1. quite expensive in foreign countries2. be not used to their way of living3. can’t get on well with foreigners sometimesYour ideas......注意:1.内容可包括上述要点,适当发挥。 2.写出你自己的观点至少两条。 3.词数:80个词左右。开头已给出,开头部分内容不记入总词数。Nowadays, studying abroad is becoming more and more popular in our country. Many middle school students like to study abroad. . 查看答案
题型:单项选择题 B1型题 -Are Bill and Mike at home now?-Yes. They _____ their mom cook. They often _____ their mom do housework.[ ]A. help; are helpingB. are helping; helpC. helps; is helpingD. is helping;helps 查看答案
题型:单项选择题 B1型题 工业制硫酸时有一反应为:2SO2+O2⇌2SO3.对该反应的有关说法错误的是( )A.该反应是可逆反应B.反应中SO2能全部转化为SO3C.催化剂能加快该反应的速率D.升高温度能加快该反应的速率 查看答案