A:to arrive
B:get to
C:to reach
D:arrive in
下列词语中加线字注音错误的拼音找出来。
不屑(xiè)制裁(cái) 滑稽(jī)一劳永逸(yù)节奏(zòu)赫赫英名(hè)____
根据文章意思,正确排序。
①Yes, we have a new music teacher.
②Do you like her?
③Is she old?
④Do you have new teachers?
⑤ No, she isn’t. She is funny.
⑥Yes, we all like her.
____
A
B
C
D
实
验
装
置
硫在氧气中燃烧
测定空气中氧气含量
铁丝在氧气中燃烧
排水法收集氢气
解释
集气瓶中的水:
吸收有害气体SO2
量筒中的水:
通过水体积的变化得出O2体积
吸收溅落融熔物
水先将集气瓶内的空气排净,后便于观察H2何时收集满