Our head teacher is kind to us and she is like our mother, ____.
A:on the way
B:by the way
C:in a way
D:in the way
①计算所用浓硫酸的体积 ②量取一定体积的浓硫酸 ③稀释、冷却 ④转移、洗涤 ⑤定容、摇匀.
回答下列问题:
— _______ harder, _______ you will catch up with your classmates.
作为医生应该救死扶伤,作为警察应该保一方平安,作为教师应该教书育人,作为学生应该认真学习……这表明( )