病历摘要：患者男性，70岁。因阵发性腹痛、恶心呕吐两天急诊入院。体检：体温38℃，脉搏100次／分，呼吸28次／分，血压15／10kPa，痛苦面容，低声呻吟，强迫体位。腹部稍膨隆，可见肠型及蠕动波，肠鸣音亢进，可闻及气过水声，腹肌稍紧张，右侧腹部触及有压痛包块。X线检查可见右侧肠腔充气并有2-3个液平面。

引流瓶内空虚的原因可能是（）。

A.胃管插入过深或过浅

B.负压装置接合不严

C.胃管头端开口多于6个

D.胃管折迭或堵塞

E.负压瓶容量少于1000ml

F.肠麻痹致胃肠分泌抑制

G.卧位不当

H.负压管高于床平面

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 minimum of fifteen hours a week on a (53) 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 Common Market 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.

61().

A.engage 

B.take 

C.expect 

D.review