20℃时,将等质量的a、b两种不含结晶水的固体物质,分别加入到盛有100g水的烧杯中,充分搅拌后,现象如图甲;然后升温到50℃时,现象如图乙;a、b两种物质的溶解度曲线如图丙。由这一过程可知 ( )

Many children act in TV shows. They work several hours every day, so they can not go to regular school. How do they get an education?
In Hollywood, many TV shows are made. About forty teachers give lessons to the children in the shows. They teach wherever their pupils are working. The teachers’job is very important. They are responsible(负责) for making sure that the children work only the permitted(允许) hours each week. They are also responsible for making sure that children learn the required subjects. They make sure, too, that the children get enough rest and play, along with their education.
Children actors are required to attend classes twenty hours each week. California law says they must be taught from September to June. If they do not make much progress in school, they are not permitted to continue working in TV shows. TV children are usually good pupils, and most of their teachers like this special kind of work. Their classes are held in some wonderful places. Sometimes the “classroom”is a Mississippi riverboat, and sometimes it is the inside of a spaceship. Often the pupils become famous TV or movie stars.
材料一台湾岛,一个美丽的宝岛,自古以来就是我国神圣领土不可分割的一部分。台湾岛物产丰富,农业发达,位于其西南沿海的布袋盐场,年产海盐可达45万吨。
材料二2021年4月3日零时左右,美国海军“马斯廷”号导弹驱逐舰出现在长江口附近海域,此后一路向南径直驶向东海。

a.专属经济区为一国从领海基线量起200公里的范围。( )
b.台湾海峡是我国的内海。( )

①推进创新驱动发展战略,发掘并培养出新的经济增长点
②实现科研资源市场配置,激发企业创新活力
③减少政府基础研究投入,着力完善创新环境
④提高企业自主创新能力,转变经济发展方式
为球心画出两个球面1和2,半径分别为
和
(
),
点位于球面1上,
点位于球面2上。下列说法正确的是( )
点电势高于
点电势
B .
点场强小于
点场强
C .
、
两点场强比为
D . 点电荷
从
点移动到
点,其电势能减小
甘茂者,下蔡人也。事下蔡史举先生,学百家之术。因张仪、樗里子而求见秦惠王。王见而说之,使将,而佐魏章略定汉中地。惠王卒,武王立。蜀侯辉、相壮反,秦使甘茂定蜀。还,而以甘茂为左丞相,以樗里子为右丞相。秦武王三年,谓甘茂曰:“寡人欲容车通三川,以窥周室 , 而寡人死不朽矣。”甘茂曰:“请之魏,约以伐韩,而令向寿辅行。”甘茂至,谓向寿曰:“子归,言之于王曰‘魏听臣矣,然愿王勿伐’。事成,尽以为子功。”向寿归,以告王,王迎甘茂于息壤。甘茂至,王问其故。对曰:“宜阳大县也上党南阳积之久矣名曰县其实郡也今王倍数险行千里而攻之难矣。今臣,羁旅之臣也。樗里子、公孙奭二人者挟韩而议之,王必听之,是王欺魏王而臣受公仲侈之怨也。”王曰:“寡人不听也,请与子盟。”卒使丞相甘茂将兵伐宜阳。五月而不拔,樗里子、公孙奭果争之。武王召甘茂,欲罢兵。甘茂曰:“息壤在彼。”王曰:“有之。”因大悉起兵,使甘茂击之。斩首六万,遂拔宜阳。韩襄王使公仲侈入谢,与秦平。武王竟至周,而卒于周。其弟立,为昭王。甘茂竟言秦昭王,以武遂复归之韩。向寿、公孙奭争之,不能得。向寿、公孙奭由此怨,谗甘茂。茂惧,辍伐魏蒲阪,亡去。樗里子与魏讲,罢兵。甘茂之亡秦奔齐,齐使甘茂于楚,楚怀王新与秦合婚而欢。而秦闻甘茂在楚,使人谓楚王曰:“愿送甘茂于秦。”楚王问于范蜎曰:“寡人欲置相于秦,孰可?”对曰:“臣不足以识之。”楚王曰:“寡人欲相甘茂,可乎?”对曰:“不可。茂诚贤者也,然不可相于秦。夫秦之有贤相,非楚国之利也。且王前尝用召滑于越,而内行章义之难,越国乱,故楚南塞厉门而郡江东。计王之功所以能如此者,越国乱而楚治也。今王知用诸越而忘用诸秦,臣以王为钜过矣。”于是使使请秦相向寿于秦。秦卒相向寿。而甘茂竟不得复入秦,卒于魏。
(节选自《史记·甘茂列传》)
①卒使丞相甘茂将兵伐宜阳。五月而不拔,樗里子、公孙奭果争之。
②甘茂之亡秦奔齐,齐使甘茂于楚,楚怀王新与秦合婚而欢。
, 满足
, 下列说法正确的是( )
, 则
B .
C . 若
, 则
D .