【名词&注释】
化学反应(chemical reaction)、高锰酸钾(potassium permanganate)、硫酸钠(sodium sulfate)、知己知彼、质量守恒定律(law of conservation of mass)、氯化铜(copper chloride)、不符合(inconformity)、固体剩余物、硝酸钡(barium nitrate)、百战不殆
[单选题]“知己知彼，百战不殆”千古名言出自
A. 孙膑
B. 孙武
C. 伍子胥
D. 庞涓
查看答案&解析
举一反三：
[单选题]9．—What's her family name?—________.
A. It's 555806
B. Jim Green
C. Linda
D. Brown
[单选题]Canada is the second largest country in the world． It is over 7,000 kilometres from the (11) coastc海岸) to the east．lt (12) six time zones． (13) it is 9 am in Vancouver on the west coast ,it is l:30．pm in St John's on the east coast．'
English and French (14) the two mamlanguages in Canada． About 60 percent of (15) people speak English ,and about 25 percent speak French． More (16 ) 70 percent of its popu-lation live in cities near the US border(边境)．
Ottawa is the capital． Every year millions of tourists go there to (17) museums and take part in the cultural(文化的) activities． Toronto is the largest city of the country (18) about 2.5 million people． Montreal is (19) second biggest French-speaking city in the world． The maple leaf is the nauonal symbol of Canada． The Canadian flag has a red maple leaf on a red(20) white background．
( )11．
A. About 60 percent of (15) people speak English ,and about 25 percent speak French． More (16 ) 70 percent of its popu-lation live in cities near the US border(边境)．
B. Every year millions of tourists go there to (17) museums and take part in the cultural(文化的) activities． Toronto is the largest city of the country (18) about 2.5 million people． Montreal is (19) second biggest French-speaking city in the world． The maple leaf is the nauonal symbol of Canada． The Canadian flag has a red maple leaf on a red(20) white background．
D. west
E. east
F. south
G. north
[单选题]有一包固体粉末，可能含有碳酸钠、硫酸钠、硝酸钡(barium nitrate)、氯化钾和氯化铜中的一种或几种。未确定其组成，进行如下实验：（1）取该固体粉末少量，加足量水，搅拌，静置，得到白色沉淀，上层为无色溶液；
A. （2）过滤，在白色沉淀中加入足量稀硝酸，白色沉淀有一部分溶解，且有无色气体产生。依据上述实验对原固体粉末的判断正确的是
B. 一定含有碳酸钠、硫酸钠、硝酸钡(barium nitrate)、氯化钾，可能含有氯化铜
C. 一定含有碳酸钠、硫酸钠、硝酸钡(barium nitrate)，一定不含氯化铜，可能含有氯化钾
D. 一定含有碳酸钠、硫酸钠、硝酸钡(barium nitrate)，可能含有氯化铜；氯化钾
E. 一定含有碳酸钠、硝酸钡(barium nitrate)，一定不含硫酸钠、氯化铜，可能含有氯化钾
[单选题]下列对化学反应前后质量变化的解释，不符合(inconformity)质量守恒定律的是
A. 高锰酸钾受热分解后固体剩余物的质量减小，是因为放出了氧气
B. 蜡烛燃烧后质量变小，是因为蜡烛受热形成了石蜡蒸气
C. 细铁丝在氧气中燃烧后，质量增大，是因为生成物中含有氧的质量
D. 白磷在密闭容器中燃烧，反应前后总质量不变，是因为生成物都没有逸散
[单选题]对标题“月光启蒙”理解最贴切的一项是（3分）
A. 月光下，母亲用甜甜的嗓音深情吟唱，让我初步了解了许多民歌童谣。
B. 在故乡明亮的月光下，母亲教会我要坚强地面对生活中的磨难。
C. 在故乡的天空下，月光启迪我领悟了浓郁的诗情和生活的真谛。
D. 明月星光下，母亲用智慧和才华陪伴我的童年，启迪我的想象和诗情。
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