you do,I will support you. [ ]
A. What
B. Whatever
C. Which
D. Whichever
答案：B
中药害虫致死高温区的温度范围是（）
A.35~40℃
B.45~50℃
C.50~60℃
D.65~70℃
碳砖的特点和用途是什么？
