热休克蛋白（）。
参考答案：
应激原如刺激等作用于真核细胞而诱导产生的一类蛋白，称为热休克蛋白或应激蛋白，可增强细胞对应激原的耐受能力和抵抗能力。
—________ is the distance from Edinburgh to Washington?
—Sorry, I don't know either.[ ]
A. What
B. How far
C. How long
D. How much
--- He was nearly drowned once.
--- When was _____?
--- _____was in 1998 when he was in middle school.
A．that; It
B．this; This
C．this; It
D．that; This
