制作精密要求高的小型木模最好选用（）
A.红松
B.白松
C.杉木
D.柚木
参考答案：D
A．(－∞，2)
B．(2，＋∞)
C．(2,3)∪(3，＋∞)
D．(2,4)∪(4，＋∞)
— We can use QQ to communicate with each other online.
— Good. Will you please show me _______. [ ]
A. which to use
B. how to use it
C. what to use
D. where to use it
