咀嚼过的口香糖正确的处理方式是：（）
A、随地乱丢
B、丢在墙角
C、包在纸里扔进垃圾箱
D、粘在墙上
参考答案：C
It's very nice _____ pictures for me. [ ]
A. of you to draw
B. for you to draw
C. for you drawing
D. of you drawing
血清钾的正常范围（）
A.3.5～5.3mmol/L
B.135～145mmol/L
C.96～108mmol/L
D.12～15mmol/L
