玉米种子的胚包括（ ）
A．子叶、胚芽、胚轴、胚根
B．种皮、胚芽、胚轴、胚根
C．胚乳、脏芽、胚轴、胚根
D．果皮和种皮、子叶、胚芽、胚轴、胚根
答案：A
列车运行图是利用表格原理表示列车运行状况的图解方式。
Speaker A. I'm dreadfully sorry, but I've burned a hole in the rug.Speaker B: ______
A．How did you burn it With a cigarette end
B．Ok, why weren't you more careful
C．Oh, that's all right.
D．I'm sorry to hear that. Is the rug very expensive
