二氧化硫在大气中的含量超过3mg/m3(2ppm),应在现场配备便携式二氧化硫检测仪或带有检测管的()指示监测器。必须指定专人保管和维护监测设备。
参考答案:比色
Liu Kai is my classmate. He is a good student and always ready to help the others. One day on his way school, he saw a little girl crosses the road. A car was coming towards to her quickly and the girl was so frightened to move. The car near hit her. Just then Liu Kai rushed up to her and caught her on the arm. The little girl was saved. She tells him where she lived, but he took her home. When Liu Kai hurried into the classroom, the teacher has already begun his lessons. He told the teacher why he was late. He was then praised for which he had done.
ITP病人血小板减少的原因是()
A.血小板大量消耗
B.血小板大量聚集
C.血小板大量破坏
D.骨髓造血功能障碍
E.血小板溢出血管