.如图所示，物重30 N，用OC绳悬挂在O点，OC绳能承受最大拉力为20N，再用

小题1:The soldier did what they could_________(save) the people under the ruins(废墟）after the

earthquake .

小题2:What great fun we had_________________(dance) at the party last night!

小题3:It’s said that 32 people ____________(die) from H7N9 so far.

小题4:She couldn’t work out the problem, so he asked her teacher for help___________(wise).

小题5:________(prevent) the communicable diseases, the doctors did as much as they could.

小题6:Look, this beautiful stamp must be one of those__________(direct).

小题7:My deskmate is often heard__________(sing) after class.

小题8:The_______of Xi Jinpin made the people in the disaster areas feel warm.(arrive)

小题9:After watching the film , he got even__________(bored).

小题10:My dream is to be a football player, What about __________ (she)?

赛龙舟是端午节的主要习俗，相传起源于古时楚国人因舍不得贤臣屈原投江死去，许多人划船追赶拯救。其实，“龙舟竞渡”早在（）就有了。

金属气割时，形成的氧化物熔渣的熔点应高于金属的熔点，否则导致气割困难。

公司、股东以及公司员工的利益与基金份额持有人的利益发生冲突时，应当优先保障( )的利益。

A．公司

B．股东

C．公司员工

D．基金份额持有人

微分方程y″+3y′=sinx的阶数是______．