下列词语字形和加点字注音全部正确的一项是：（ ）（3分）

【名词&注释】

光合作用、双氧水(hydrogen peroxide)、高锰酸钾(potassium permanganate)、洗洁精、化学变化(chemical change)、食品包装袋(food packing bag)、食盐水(salt water)、液态空气(liquid air)、惟妙惟肖

[单选题]下列词语字形和加点字注音全部正确的一项是：（ ）（3分）

A. 滑稽（jī）俪（lí）歌 猝（chù）然长逝
B. 狩（shòu）猎胆怯（què）惟妙惟肖（xiāo）
C. 亢（kàng）奋恻（cè）隐 强聒（guō）不舍
D. 沉缅（miǎn）阔绰（chuò） 顶礼膜（mò）拜

查看答案&解析查看所有试题

学习资料：

[单选题]下列做法不正确的是【】

A. 用熟石灰改良酸性土壤
B. 用洗洁精清洗餐具上的油污
C. 用食盐水^{(salt water)}检验硬水和软水
D. 用氮气充入食品包装袋防腐

[单选题]Stress is the feeling you get when you're really worried about something． This is the kind of worry that troubles you for hours，or even days．It makes you feel (11)，scared(恐惧的)，or angry． You may find it difficult to eat and sleep，or you might eat and sleep much(12) than usual． Stressing out will lead to serious 'problems like heart illness．(13) not all stress is bad for you． The good kind (14) your body and mind alert(机敏的) and can make you perform better，like when you're giving a speech to your class or running to the finish line．What causes stress? Do you know(15) your dad is worried about the bills，or your mom is unhappy? Because they're stressed out! There are lots of things in your life that ,(16) cause stress-having too much homework，taking a test in a subject that you are not good (17) ，or hearing your parents argue!

A. If you're stressed out，try these quick and easy
B. Try to get at least eight hours of sleep every night． Eat a healthy，balanced (19) that includes all kinds of food． Talk with your close friends，family members or teachers: It'll make you feel better，and (20) may be able to give you advice and help you solve your problem．
D. calm
E. excited
F. surprised
G. upset

[单选题]下列关于氧气获得方法的叙述，错误的是（ ）

A. 植物的光合作用是空气中氧气的主要来源
B. 工业上从液态空气^{(liquid air)}中得到氧气的过程是化学变化
C. 实验室用双氧水制氧气，常用二氧化锰作催化剂
D. 加热高锰酸钾可以得到氧气

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