
【名词&注释】
第一次(the first time)、球类运动(ball games)、小苏打(sodium bicarbonate)、悲天悯人(bemoaning)、不定冠词(indefinite article)、锲而不舍(perseverance)、“韬光养晦”、玻璃棒(glass rod)、稀释浓硫酸
[单选题]化学实验过程中要规范操作,注意实验安全。下列有关做法中错误的是
A. 洒在桌面上的酒精燃烧起来,立即用湿抹布或沙子扑灭
B. 稀酸飞溅到皮肤上,立即用大量水冲洗再涂上3℅~5℅的小苏打溶液
C. 点燃氢气前,一定要先检验氢气的纯度
D. 稀释浓硫酸时,一定要把水注入浓硫酸中,并不断用玻璃棒(glass rod)搅拌
查看答案&解析
举一反三:
[单选题]We can read such a passage ______.
A. in a newspaper
B. in a storybook
C. in a picture book
D. in a textbook
[单选题]20.
A. old
B. many
C. often
D. far
[单选题]8. Betty can play ________ guitar, but she can't play ________basketball.
A. a;a
B. the;the
C. a;the
D. the;/
[单选题]How long has Katy been in Nepal?
A. eight months
B. six months
C. four months
D. one moth
[单选题]2. Don't talk to Simon like that. He is only _______ eleven-year-old boy.
A. a
B. an
C. the
D. /
[单选题]原始地球的大气中没有哪种物质( )
A. 氧
B. 二氧化碳
C. 甲烷
D. 氢
[单选题]15.
A. it
B. they
C. them
[单选题]What is the author’s purpose in writing the passage?
A. To give a prescription for insomnia.
B. To urge people to sleep less.
C. To analyze the sleep pattern of modern people.
D. To throw new light on human sleep.
[单选题]下列词语中,加点字的注音完全正确的一项是( )
A. 追溯(shuò) 冗长(rǒnɡ) 栖息(qī) 锲而不舍(qiè)
B. 虐待(nüè) 谩骂(màn) 奢侈(chǐ) 猝不及防(cù)
C. 伫立(zhǔ) 憎恶(zènɡ) 横亘(ɡènɡ) 悲天悯人(mǐn)
D. 沮丧(jǔ) 聆听(1ínɡ) 拘泥(nì) 韬光养晦(hùi)
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