渐尖
参考答案：
叶尖较长，或逐渐尖锐，如菩提树的叶。
mRNA 丰度
—I don’t know _______________．
—Don’t mention it． He is always so strange．
A．what the matter with him
B．what is the matter with him
C．what matter with him
D．what the matter is with him
