异烟肼与维生素B合用（）
A.增强疗效
B.延缓耐药性的发生
C.降低毒性作用
D.提高机体的耐受性
E.治疗多种疾病
参考答案：C
All in all, the TV programmes were peaceful and entertaining,but the following programme contains scenes that may be ______ to some viewers.
A．satisfying
B．disturbing
C．interesting
D．positive
为什么反应前后各物质的质量总和一定相等？
