螺栓类紧固件通常用于传递（）的连接。
A、较小的集中载荷
B、较小的分布载荷
C、较大的集中载荷
D、较大的分布载荷
参考答案：C
—Of the two apples, which one do you prefer?
—_______bigger one. It’smost delicious one, I think.
A．The; the
B．A; a
C．A; the
D．The; a
--Who are you waiting for?
-- _____ the man wounded in the left leg.
A．The doctor will operate on
B．Tie nurse to be looked after
C．The doctor to operate on
D．His brother got
