近年来相继发生的“毒奶粉”、“瘦肉精”、“染色馒头”等恶性食品安全事件，引发某校

Visitors to this country are normally admitted for six months, but foreign students can usually stay for one year. They must (51) an educational institution, and they are required to study for a minimum of fifteen hours a week on a (52) course. Prospective students have to show that they can afford their studies, and that they have sufficient (53) resources to support themselves (54) in this country.

In order to work here the foreigner needs a work permit, (55) must be applied for by his prospective employer. The problem here is that the Department of Employment has the right to grant or (56) these permits, and there is little that can be done (57) it; it would be extremely unwise for a foreign visitor to work (58) 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 (59) 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 (60) part-time jobs while they are studying here.

55().

A.when 

B.what 

C.where 

D.which

出境集装箱报检应提供买卖双方签订的合同、信用证、装箱积载单、装箱明细单。 ( )

某生物小组为了探究唾液对淀粉的消化作用，取1g干淀粉加入清水100mL，调和均匀．煮沸制成糨糊，冷却．在A．B试管内分别加入2mL糨糊进行实验（如图），请你帮助完成并回答问题．

（1）向A试管内加入清水2mL，应向B试管内加入的液体和数量是______．

（2）按照图中所示实验步骤完成后，取出A、B试管冷却，并分别加入2滴碘液，可观察到的现象是：A试管内溶液______，B试管内溶液______．

（3）根据以上实验现象可以得出的结论是______．

（4）根据（3）的结论，如果想要进一步探究胃液对淀粉的消化作用，把加入A试管内的2mL清水换成2mL胃液，其他条件不变，可以得到的结论是______．

既能息风止痉，又能祛风湿，止痹痛的药物是

A．羚羊角

B．地龙

C．钩藤

D．天麻

E．珍珠

创造“铁人精神”的人是哪一位？（）

A.王进喜

B.王军霞

C.王金祥

D.王稼祥