有关丙烯腈的说法正确的是（）
A.有毒
B.能灼伤皮肤
C.低浓度时刺激黏膜
D.难溶于氯仿
参考答案：A, B, C
Don't speak ___. Listen to me _____. [ ]
A. anything; careful
B. something; carefully
C. anymore; carefully
D. everything; carefully
分析选择接入Internet的方式，应采用何种方式？试阐述理由
