女性，28岁。妊娠后期出现进行性背痛，下肢乏力，食欲减退。查体：第7胸椎轻度后凸，有

默写。（每空1分，共9分）

（1）                    ，恒兀兀以穷年。

（2）无言独上西楼，月如钩，　　　　　　　　 　　　。

（3）                  ，愁云惨淡万里凝。（岑参《白雪歌送武判官归京》）

（4）无可奈何花落去，                      。（晏殊《浣溪沙》）

（5）若夫日出而林霏开，                     。（欧阳修《醉翁亭记》）

（6）长风破浪会有时，                    。（李白《行路难》）

（7）                ，悠然见南山。（陶渊明《饮酒》）

（8）吴均在《与朱元思书》中为我们淋漓尽致地展示了江水的千姿百态，其中“           ，               ”这两句生动地描写出了富春江水湍急奔腾的气势。

刘某某日休假，主动携邻居6周岁小孩去一塌陷区游泳，到了傍晚，刘某喊了几声小孩的名字，见没人答应，便径直回家了，之后既不寻找小孩，也没告知邻居，第二天，在塌陷区发现小孩的尸体。刘某行为属于：

A．故意杀人

B．意外事件

C．过失致人死亡

D．不构成犯罪

在税务行政复议范围中，下列行为属于税务机关作出的征税行为的有()。

A．税务机关拒绝颁发税务登记证、发售发票

B．税务机关委托扣缴义务人作出的代扣、代收税款行为

C．税务机关作出的税收保全措施

D．税务机关审批出口退税

不属于异常肺泡呼吸音的是（）

A.肺泡呼吸音减弱

B.支气管语音

C.呼气时相延长

D.断续性呼吸音

E.粗糙性呼吸音

Immigrants are consumers as well as producers, so they create jobs as well as taking them. And the work they do need not be at the expense of native workers. Immigrants often hold jobs that natives are unwilling to accept at any feasible wage.

Also, immigrants sometimes help to keep industries viable (能存活的) that would otherwise disappear altogether, causing employment to fall. This was the conclusion of a study of the Los Angeles garment industry in the 1970s and 1980s. And when immigrants working for low wages do put downward pressure on natives’ wages, they may raise the (real) wages of natives in general by keeping prices lower than they otherwise would be.

In theory, then, the net effect of immigration on native wages is uncertain. Unfortunately, most of the empirical (经验主义的) research on whether immigrants make natives worse off in practice is also inconclusive except the effect, one way or the other, seems small. Most of this research has been done in America: if there were any marked influence on wages, that is where you would expect to find it, given the scale of immigration and the tendency of the newcomers to concentrate in certain areas. But most studies have compared wages and employment in areas with many immigrants to wages and employment in areas with few. For instance, one examined the impact of sudden and notorious inflow of refugees to Miami from the Cuban port of Mariel in 1980. Within the space of a few months, 125000 people had arrived, increasing Miami’s labor force by 7%. Yet the study concluded that wages and employment among the city’s natives, including the unskilled, were virtually unaffected. Another study examined the effect of immigration on wages and employment of those at the bottom of the jobs ladder-unskilled blacks and Hispanics. It found that a doubling of the rate of immigration had no detectable effect on natives.

The most recent work, admittedly, has tended to question these findings. Using more detailed statistics and more sophisticated methods than the earlier studies, this work has tended to find that immigrants’ wages take longer to rise to the level of the natives’ wages than has been supposed. This implies a more persistent downward pressure on the host economy’s labor market.

Typically these studies find that immigration does depress unskilled natives’ wages to a small extent. But nearly all economists would agree that the effects of immigration are insignificant in relation to other influences.

It is certain, according to empirical research, that ().

A. immigration has a positive effect on native wages

B. immigration makes unskilled blacks and Hispanics worse off

C. immigration has only a small effect on native wages

D. immigration has a marked influence on natives in areas with dense immigrant population