It is said that his new book consists of nine chapters.
A:is made up of
B:is connected to
C:is covered with
客怀
宋·何应龙
客怀处处不宜秋,秋到梧桐动客愁。
想得故人无字到,雁声远过夕阳楼。
溶质的质量分数= ____ ,溶质的质量=____ .
(其中有杠杆原理和浮力理论的叙述,还有声学和光学的记载。)