三班倒人员在饮食和营养方面应当多补充一些水分、食盐和水溶性维生素等。
参考答案：对
王老师想为希望小学五年级（2）班的同学购买学习用品，了解到某商店每个书包价格比每本词典贵6元，用123元正好可以买到3个书包和2本词典，则每个书包与每本词典的价格分别为多少？
I took the wrong train ______, I didn't even know it until half an hour later. [ ]
A. by mistakes
B. by mistake
C. with mistake
D. with mistakes
