紫杉醇主要存在于红豆杉的()中。
A.树种
B.树皮
C.树叶
D.树根
参考答案:B
He went out without an umbrella , __________ in the rain.
A.risked being caught
B.risking being caught
C.risked to be caught
D.risking to be caught.
计算机中的“数据”是一个广义的概念,包括数值、文字、图形、图像、声音等多种形式。()