I _young then. A. is B. am C. was

---Did Mark win the 100-meter race?

---     . He did _____ I.

A．Yes; no better than

B．No; no worse than

C．Yes; much worse than

D．No; no better than

针∶编织

A．织布机∶编织

B．肥皂∶洗

C．床∶睡觉

D．火柴∶燃火

用于人力起重的钢丝绳安全系数为（）．

A、3.5

B、4.5

C、5~6

D、10

Windows中，激活快捷菜单的操作是（）

A.单击鼠标左键

B.移动鼠标

C.拖放鼠标

D.单击鼠标右键