题干
It is said that his new book consists of nine chapters.
A：is made up of
B：is connected to
C：is covered with
答案(点此获取答案解析）
A
It is said that his new book consists of nine chapters.
A：is made up of
B：is connected to
C：is covered with
．维生素C在碱性溶液中易被氧化，能被I2定量氧化 
测定橙子中维生素C的含量的实验步骤如下（所用蒸馏水均已煮沸冷却）：