【名词&注释】
婴幼儿(infant)、活性炭(activated carbon)、肾结石(kidney calculi)、化学性质(chemical properties)、不合理(unreasonable)、密切相关(closely related)、肥皂水(soapsuds)
[单选题]下列对实验现象的描述正确的是
A. 铜片放入盐酸中有气泡产生
B. 在硬水中滴入肥皂水(soapsuds)会产生浮渣
C. 铁在空气中燃烧火星四射
D. 紫色石蕊试液使盐酸变红
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举一反三：
[单选题]婴幼儿食用添加三聚氰胺的奶粉易患肾结石。下列描述属于三聚氰胺化学性质的是（ ）
A. 白色粉末
B. 无味
C. 微溶于水
D. 呈弱碱性
[单选题]18．
A. is
B. are
C. have
D. has
[单选题]化学与生活密切相关(closely related)。生活中的下列做法不合理的是
A. 煤炉火上放一盆水，就能防止一氧化碳中毒
B. 冰箱中的异味，可用活性炭除去
C. 电器着火，应先切断电源再灭火
D. 羊毛和涤纶，可用燃烧法区分
[单选题]23． We-d better read in the morning because________ ．
A. it is difficult to get good results
B. the air is fresh and our minds are clear
C. it is easy to remember what we have learned
D. both B and C
[单选题]42_______.
A. build
B. building
C. tobuild
D. builds
[单选题]3． Please put on your sweater．lt-s very __________outside．
A. hot
B. cold
C. expensive
D. small
[单选题]14．
A. it
B. this
C. that
D. one
[单选题]WhichofthefollowingisNOTtalkedaboutinthispassage?
A. ZhaoTaoisamiddleschoolstudent.
B. China’snewproductsareexcellent.
C. Thevolunteersareworkingveryhard.
D. Theexpogardenisnowverycrowded.
[单选题]9．
A. Writers
B. Children
C. Companies
D. Friends
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