下列各泵中（）的效率较低。
A、螺杆泵；
B、轴流泵；
C、喷射泵；
D、离心泵。
参考答案：C
—I hear that Mr King was robbed of his new mobile phone on his way home last night.
—______! He shouldn't go home so late.[ ]
A. Oh, never mind
B. What a pity
C. You're welcome
D. Sorry to hear that
