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问题 多项选择题

外国人申请各项签证、证件的延期或者变更，须履行下列手续（）

A、提供与延期或者变更事由有关的证明

B、提供在华期间没有受过刑事处罚的证明

C、交验护照和签证、证件

D、填写延期申请表或者变更申请表

答案

参考答案：A, C, D

单项选择题

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
Open Shortest Path First(OSPF) is a (66) routing algorithm that (67) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (68) processing power. The Dijkstra algorithm is used to calculate (69) OSPF routing table updates only take place when necessary, (70) at regular intervals.

A．more

B．less

C．same

D．most
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单项选择题

有机磷杀虫药对人体的毒性主要是

A．增加胰腺胆碱酯酶活力
B．增加乙酰胆碱的产生
C．减少乙酰胆碱的产生
D．增加缓激肽的产生
E．抑制乙酰胆碱酯酶的活力
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