下列物质可用作生物战剂的是（）
A、糜烂性毒剂
B、炭疽杆菌
C、窒息性毒剂
参考答案：B
Tom, as well as his best friend Jerry, ________decided to have a holiday on the warm seaside. [ ]
A. have
B. has
C. are
D. is
有关人体的组成元素的认识错误的是 （ ）
