QB-2700小缝台绷缝机，最多能装（）根直针。
A.5
B.2
C.3
D.4
参考答案：D
电刷镀镀笔的散热片通常选用塑料制作。
Not all events in history are as_______ as this. [ ]
A. terribly
B. more terrible
C. the most terrible
D. terrible
