降糖灵属于哪类降糖药
A．磺酰脲类B．双胍类C．α-葡萄糖苷酶抑制剂D．胰岛素敏感性改善剂E．以上都不对
参考答案：B
---I phoned you at six yesterday afternoon, but nobody answered.
----I _______ a walk with my parents near the river.
A．am taking
B．was taking
C．took
D．will take
脱硫湿式球磨机喷射装置启动步骤是什么？
