皮皮学，免费搜题
登录
搜题
【简答题】
在△ABC中，已知BC=12，A=60°，B=45°，则AC=______．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】发夹结构(hairpin structure)
【单选题】Suppose Trial 1 is repeated except at a current of 10 rnA. At 200 sec, the volume of 02 reacted will most likely be: A.less than 0.25 mL.
B.
between 0.25 mL and 0.32 mL.
C.
between 0.32 mL and 0.39 mL.
D.
0.40 mL, because the stopcock will be closed much sooner than 200 sec.