从使用中烤箱内取出烤砂盘时摆放位置有什么要求?
参考答案:放在铁制砂样台上或具有阻燃功能的平台上。
We are a little worried because we _____ the ground as a leader in the field of IT with the others speeding up development.
A.are losing
B.were losing
C.lost
D.have lost
结核杆菌检查用哪种染色方法()
A.瑞氏染色
B.吉姆萨染色
C.巴氏染色
D.新亚甲蓝活体染色
E.抗酸染色