【判断题】变形杆菌毒素是一种强烈的神经毒素,是目前已知的化学毒物和生物毒物中毒性最强的一种
【单选题】某架信号机点亮绿灯时,其相应的分线柜测试电压值大概是多少( )
【单选题】以下哪种毒素是目前已知的化学毒物与生物毒素中毒性最强烈的一种,对人的致死量10-9mg/kg体重,其毒力比氰化钾大一万倍:
【单选题】What are the two speakers discussing?
A.
How proverbs are created.
B.
Why people don't use proverbs now.
C.
How proverbs are handed down.
D.
Why there are more proverbs in some cultures.