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Science Lesson
1008-0031
1999 Issue 11
dui bi shi yan zuo yong da
li bin
..............
page:17
ye shuo chang shi ke jiao xue de can yu du
wang xian de
..............
page:15
ting yuan jing ji yu zi ran jiao xue
..............
page:30
ke yuan ji cui
..............
page:31
ya mo biao ben
zhu zhi feng
..............
page:26
yong wan de zuo zuo yao tuo shan chu li
chen gang
..............
page:20
qing bao hu hai zi de chuang xin meng ya
liu gui qin
..............
page:20
wei liao shan qu hai zi de ming tian hu bei gu cheng xian zuo shan lin chang xiao xue shi shi wo tu / cai hong fang an
..............
page:23
bu yong ke ben ye you hao chu
xu wei jun
..............
page:18
zi ran ke gai ge de tu po kou xue xi liu mo geng xiao xue ke xue jiao yu si xiang zhi san
..............
page:3
dui qi ti re zhang leng suo shi yan fang fa de gai jin
pan wei feng
..............
page:27
luan shi de xing cheng deng shi yan de bu chong
lian xue lin
..............
page:26
tan jiu zuo zuo de sheng huo mi mi
ji nan shi duan dian zhen ren zhuang xiao xue ke ji xiao zu
..............
page:32
mao xi xian xiang ke tang shi lu yu ping xi
yao ji hong ; wang da guang
..............
page:8-10
wo zhao dao liao yi wei hao lao shi hao peng you
ma zhi hua
..............
page:25
chun feng zheng xiang shi zi ran xue ke xue xi guan che quan jiao hui jing shen bi tan
ben kan bian ji bu
..............
page:4
yu kun jing zhong jian gong fu
yao ai xiang
..............
page:18-19
gei hai zi men ti wen de ji hui
shen yan qin
..............
page:19
hei bai wu ti xi shou fu she re shi yan she ji
yu shao jin
..............
page:27
zou chu zi ran ke dian hua jiao xue de wu qu zi ran guan mo ke you gan
ma zuo ; liu ya zuo
..............
page:21
bian ji bu bao gao
..............
page:1
qi fa chuang zao jing shen de yi xie jiao xue shi jian
gao gui xue ; ren si yuan
..............
page:16
qian tan ke ji huo dong ke de lei xing ji te dian
tang shou shuang
..............
page:22-23
dui 21 shi ji shui zi yuan wen ti de si kao
tang hong xiao
..............
page:1
zhong guo zhen xi dong wu ( shi ) ye zuo niu
..............
page:33
re kong qi jiao an
zhang ai min
..............
page:6-7
jiao yu guan nian de zhuan bian yu guan nian tai du de jiao yu
zhang wen
..............
page:14
na yi zhong shi yan fang shi xiao guo hao
zhang su qin
..............
page:21
cong yi bei shui bian liang zhan kai yan jiu
zhang qi dong
..............
page:12-13
su zhi jiao yu yao zuo hao san jian shi
li de qiang
..............
page:4
wo men de ya chi jiao xue she ji
chen juan
..............
page:11-12
wo zhe yang gai jin da qi you ya li de shi yan
tian ke deng
..............
page:26
re kong qi yi ke de shi yan gai jin
tang zong bi
..............
page:27
huan jing bao hu wen zhai
..............
page:28-29
yun yong dian jiao shang luan shi de xing cheng
liu shi qing
..............
page:12-13
tai yang xi zhong xing xing shu ju de bu chong
wu ru chun
..............
page:15
shan xi xiao xue zi ran jiao shi shi yan cao zuo bi sai huo dong
jia ya qin
..............
page:25
qiao yong pi jiu ping
sheng min
..............
page:16
shi yan yu zhi zuo yao zeng jia pian fu liao
ben kan bian ji bu
..............
page:25
shui shi you yan se de ma ? shui yi ke de jiao xue yan shen
zuo shun
..............
page:17
hui li ji jin hui jiang ye you xiu xue sheng si xue zi ru xue shen zao
liu ze yu
..............
page:24
zhao zhun fang xiang geng shang wei lou
wu xiang dong
..............
page:5-6
zi ran xue ke xian zou liao 20 nian
xie xian gang
..............
page:5