治疗与抢救休克首要的中心环节为A．应用血管活性药 B．应用纠酸药物 C．消除病因补充

“伤寒二三日，心中悸而烦者”，应用（）

A.大建中汤

B.茯苓桂枝白术甘草汤

C.厚朴生姜半夏甘草人参汤

D.小建中汤

E.桂枝人参汤

如图所示，在倾角θ＝30°，相距L＝1m的光滑轨道上端连有一电阻R＝9Ω，整个轨道处于垂直轨道方向的磁感应强度B＝1T的匀强磁场中，现在轨道上由静止释放一质量m＝100g，电阻r＝lΩ的金属棒，当棒下滑s＝5m时恰好达到最大速度，不计导轨电阻.

求:

(1)棒下滑的最大速度.

(2) 棒下滑的速度为3m/s时棒的加速度大小为多少

(3) 电阻R在这个过程中产生的热量.

对于合体细胞及朗汉斯细胞，下列哪些项是恰当的（）

A.朗汉斯细胞是分裂生长的细胞

B.合体细胞由朗汉斯细胞分化而来

C.合体细胞是执行功能的细胞

D.朗汉斯细胞分泌人胎盘生乳素

E.朗汉斯细胞分泌绒毛膜促性腺激素

Today’s lecture is about the mass (1) of the world’s population. There are two major (2) why people are moving to cities. The first reason is (3) . People are moving to the cities because that’s where they can find (4) and earn money. The second reason for the move to cities has to do with (5) of life issues: comfort and (6) . Cities often offer better (7) . And then for many, city life is just more (8) . An interesting consequence of urbanization is that the average (9) of people in the countryside is increasing, while that of the cities is (10) .
Three key (11) can be identified in our cities. First of all, they’re getting bigger. Most cities are bigger now than ever before. Cities are also changing shape. They’re getting (12) , because land is getting more and more expensive. (13) have become a symbol of modern cities.
Cities are also changing shape in other ways. The (14) Model and the (15) Nuclei Model are probably more typical of the cities we know today. They show the urban (16) that’s occurring in contemporary cities.
The third change is that our cities are breaking up into (17) communities, often by (18) group or (19) level. This often means that people stay within their community and do not come into contact with others from different (20) .

既可再燃，又可复发的疟原虫种类是

A．间日疟原虫、恶性疟原虫

B．间日疟原虫、卵形疟原虫

C．卵形疟原虫、恶性疟原虫

D．三日疟原虫、恶性疟原虫

E．卵形疟原虫、三日疟原虫