国际上最早对人体实验制定基本国际准则的医德文献是()
A.《希波克拉底誓言》
B.《赫尔辛基宣言》
C.《纽伦堡法典》
D.《日内瓦协议》
E.《东京宣言》
参考答案:C
The coldest and most difficult place in the world in which to live is Antarctica. Antarctica is the land of snow and ice near the South Pole. Most people do not think there is much life in the icy waters around it. They are wrong.
Antarctica's seas are full of life. There are many kinds of fishes, water birds, seals and whales. They eat the thick plant life in the sea and the smaller water animals. Some whales, for example, eat more than a ton of food every day.
The most famous animal of Antarctica is the penguin. It struts around the icy as if it were a movie star walking down the street.
小题1:The best title is ____________.
小题1:
A.Thick Plant Life
B.Life Around Antarctica
C.Tons of Food
D.Penguins小题2:The most famous animal of Antarctica is the ____________.
小题2:
A.whale
B.seal
C.penguin
D.fox小题3:Antarctica has ____________.
小题3:
A.much ice
B.warm weather
C.flocks of geese
D.warm water小题4:Around Antarctica there ____________.
小题4:
A.are many people
B.is little plant life
C.are many animals
D.is little snow小题5:The word “struts” in the last paragraph means____________.
小题5:
A.swims gracefully
B.walks proudly
C.runs swiftly
D.jumps happily
A、根据氢氧化钙的溶解度曲线,完成下列问题.
氢氧化钙溶解度曲线
(1)曲线上满足A点指标的溶液在升高温度后会产生的现象是:______,此时的溶液中溶质质量分数将______(选填“变大”或“变小”或“不变”)
(2)若向曲线上满足A点指标的溶液中加入生石灰,则溶液中的溶质质量将______(选填“增加”或“减少”或“不变”)
B、根据氯化钠的溶解度曲线,完成下列问题.
氯化钠溶解度曲线
(1)A点所示溶液为某温度下氯化钠的______(选填“饱和”或“不饱和”)溶液.
(2)将B点所示的溶液升高温度到40℃(忽略水的蒸发),此时溶液中溶质质量分数将______(选填“变大”或“变小”或“不变”).
(3)B点代表20℃时氯化钠的溶解度为36.0g,若将满足B点指标的溶液恒温蒸发10g水,会有______g氯化钠晶体折出.