简述工资集体谈判应遵循的原则。

如图所示的电路中，下列做法对电流表有危险的是（　　）

A．同时闭合S₁、S₂

B．同时闭合S₁、S₃

C．同时闭合S₂、S₃

D．同时闭合S₁、S₂、S₃

鼠标属于计算机的输入设备。

Many students didn’t realize the importance of study _______ they left school.

A．when

B．until

C．after

D．unless

Questions 14-18

·Using the information in the text, complete each sentence 14-18 with an expression from the list below.
·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet.
·Do not mark any letter twice.

• A. end up
• B. get up
• C. screw up
• D. stay in bed
• E. stay up
• F. wake up
• G. wind down

Sleeping in on weekend mornings will ______ our biological clocks.

军队财务条例在支出管理中规定：军队单位应当建立健全经费使用管理制度。各级财务部门应当执行（）等环节的审核管理制度。

A.预拨款

B.预借款

C.经费支付

D.结算