工程咨询单位的生命线是( )。A．加强研发创新 B．咨询服务质量 C．识别核心能力

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

The    小题1:____ Chinese dynasty to rule came from Manchuria, in northeast China. The Manchus were unable to    小题2:other nations from interfering with China. The British defeated China in the Opium Wars. The outsiders seized Hong Kong,  小题3:___ more importantly, the British forced the Chinese government    小题4:___( allow) them to sell a dangerous drug called opium to the Chinese people. Japan    小题5:___(seize) the island of Formosa, which later became    小题6:(know) as Taiwan. By the turn of the twentieth century, foreigners had overrun China. Parts of China were ruled by British, French, American, German, Russian, and Japanese forces. The Chinese people believed that the Manchus    小题7:___(lose)the Mandate of Heaven. Many people began to support a group known    小题8: the Nationalists, who pledged to free China    小题9:___ foreign rule. In 1911, the Nationalists drove from power a six-year-old boy, who was    小题10:____ last of the Manchu rulers.

设f（x）=xlnx，若f′（x₀）=2，则x₀=______．

甲乙两个小物体，甲的重力是乙的3倍，他们从同一高度处同时自由下落（不计空气阻力），则下列说法中正确的是（　　）

A．甲比乙先着地

B．甲乙同时着地

C．甲的加速度比乙大

D．无法确定谁先着地

补写出下列名句名篇中的空缺部分。（任选3题，多选只按前3题计分）（6分）

小题1:转轴拨弦三两声，                 。（白居易《琵琶行》）

小题2:                 ，望帝春心托杜鹃。（李商隐《锦瑟》）

小题3:                 ，更那堪，冷落清秋节。（柳永《雨铃霖》）

小题4:千古江山，英雄无觅，孙仲谋处。       ，       。（辛弃疾《永遇乐·京口北固亭怀古》）

机体锌缺乏的体征有（）

A、指甲变脆

B、皮肤干燥

C、口角溃烂

D、面色苍白