滤失量

非洲草原一年又旱季和雨季之分，猴面包树是非洲草原特有树种，它的树干高达20米，树径达15米以上．分析回答：

（1）猴面包树雨季叶多，旱季叶全掉光，这与非洲的______环境相适应，这样能减少植物体内______的流失．

（2）猴面包树虽然外形奇特，但是果实汁多味甜，是猴和猩猩最喜爱的食物，由此可以推断猴面包树是用______繁殖后代的，属于______植物．

（3）果实的结构包括______和______两部分．

Visitors to this country are normally admitted for six months, but foreign students can usually stay for one year. They must (52) an educational institution, and they are required to study for a (53) of fifteen hours a week on a daytime course. Prospective students have to show that they can afford their studies, and that they have sufficient (54) resources to support themselves (55) in this country.

In order to work here the foreigner needs a work permit, (56) must be applied for by his prospective employer. The problem here is that the Department of Employment has the right to grant or (57) these permits, and there is little that can be done (58) it; it would be extremely unwise for a foreign visitor to work (59) a permit, since anyone doing so is liable to immediate deportation (驱逐出境). There are some people from the European countries, who are often given (60) residence permits of up to five years. Some other people, such as doctors, foreign journalists, authors and others can work without permits, and foreign students are normally allowed to (61) part-time jobs while they are studying here.

56().

A.it 

B.what 

C.that 

D.which

以下哪种表现属于替牙时的暂时性错（）。

A.上颌中切牙萌出早期出现间隙，上唇系带过低

B.上颌侧切牙，萌出早期牙冠向远中倾斜

C.上下恒切牙萌出早期前牙出现反

D.上下第一恒磨牙建初期为偏近中关系

E.以上都不是

患者女，55岁。因上缺失，进行固定义齿修复，1年后基牙有咬合痛、松动。其主要原因为（）

A.设计不合理

B.固位力不够

C.基牙数目少

D.末端侧下沉

E.咬合早接触

根据借贷双方的协定，在借贷期内依据某种市场利率进行调整的利率是（）

A、固定利率

B、基准利率

C、浮动利率

D、短期利率