两面一销定位能限制______个自由度。A．四 B．五 C．六

. Finding his iPad stolen on the bus, ________.

A．the bus driver was asked to help

B．the bus was searched

C．it was looked for everywhere

D．David called for help

— 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

进入灾区进行一般技术操作的小队，项目连续操作每小项之间允许休息时间不得超过（）min。

A、5min

B、8min

C、10min

D、12min

根据工作项目与进度计划，重点检查计划执行情况，包括()。

A.设计标准拟定和论证工作进展

B.设计方案比选论证工作进展

C.部位勘察工作进展和物理力学性质试验工作进展

D.工艺方案、主体工程设计的进展

E.设计内容各专业结合部接口资料的落实

腰椎侧屈的正常角度是

A．0°

B．20°

C．45°

D．60°

E．50°