某患者，女，19岁。医生的诊断记录是：安氏I2类2分类；毛氏Ⅳ类1分类加I1类1分类。

安氏I2类2分类的表现是

A:第一磨牙中性关系，前牙深覆 B:第一磨牙远中关系，上前牙唇向倾斜 C:第一磨牙远中关系，上前牙舌向倾斜 D:第一磨牙近中关系，上前牙唇向倾斜 E:第一磨牙近中关系，上前牙舌向倾斜

某患者，女，19岁。医生的诊断记录是：安氏I2类2分类；毛氏Ⅳ类1分类加I1类1分类。

毛氏Ⅳ类1分类的表现是

A:第一磨牙远中关系，前牙覆 B:第一磨牙近中关系，前牙深覆 C:上牙弓宽于下牙弓后牙深覆盖 D:前牙深覆，面下1／3过低 E:双颌或双牙弓前突

某女性患者，19岁，医生的诊断记录是：安氏Ⅱ类2分类；毛氏Ⅳ类1分类加Ⅰ类1分类。

安氏Ⅱ类2分类的表现是

A:第一磨牙中性关系，前牙深覆 B:第+磨牙远中关系，上前牙唇向倾斜 C:第一磨牙远中关系，上前牙舌向倾斜 D:第一磨牙近中关系，上前牙唇向倾斜 E:第一磨牙近中关系，上前牙舌向倾斜

某女性患者，19岁，医生的诊断记录是：安氏Ⅱ类2分类；毛氏Ⅳ类1分类加Ⅰ类1分类。

毛氏Ⅳ类1分类的表现是

A:第一磨牙远中关系，前牙覆 B:第一磨牙近中关系，前牙深覆 C:上牙弓宽于下牙弓、后牙深覆盖 D:前牙深覆，面下1／3过低 E:颌或双牙弓前突

酚类主要来自工业排废，又是染料、制药、树脂含成等工业的重要原料。动、植物代谢及机体分解也有酚类物质生成，故酚类物质与人类关系极其密切。酚类物质虽毒性不高，但多有恶臭，是卫生检验的重要项目

水质分析中，检测挥发酚类的卫生学意义是什么？

A:酚及其氯化物多有恶臭 B:酚是一种传统消毒剂，对生物机体有重大损害 C:挥发酚类影响水质感官性状，属水质标准的一般化学指标 D:挥发性酚都有一定毒性，卫生标准中属毒理学指标

某患者，女，19岁。医生的诊断记录是：安氏Ⅱ类2分类；毛氏Ⅳ类1分类加Ⅰ类1分类。

安氏Ⅱ类2分类的表现是

A:第一磨牙中性关系，前牙深覆 B:第一磨牙远中关系，上前牙唇向倾斜 C:第一磨牙远中关系，上前牙舌向倾斜 D:第一磨牙近中关系，上前牙唇向倾斜 E:第一磨牙近中关系，上前牙舌向倾斜

某患者，女，19岁。医生的诊断记录是：安氏Ⅱ类2分类；毛氏Ⅳ类1分类加Ⅰ类1分类。

毛氏Ⅳ类1分类的表现是

A:第一磨牙远中关系，前牙覆 B:第一磨牙近中关系，前牙深覆 C:上牙弓宽于下牙弓后牙深覆盖 D:前牙深覆，面下1／3过低 E:双颌或双牙弓前突

For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to.

A:connectionless B:connection-oriented C:datagram D:telegram

For（1） service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new （2） for every packet sent. Instead,when a connection is established, a route from the （3）machine to the destination machine ischosen as part of the connection setup and stored in tables inside the（4）That route is used forall traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-orientedservice, each packet carries an （5）telling which virtual circuit it belongs to.

A:connectionless B:connection-oriented C:datagram D:telegram

For（）service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new（）for every packet sent. Instead, when a connection is established, a route from the（）machine to the destination machine is chosen as part of the connection setup and stored in tables inside the（）That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an（）telling which virtual circuit it belongs to.

A:connectionless B:connection-oriented C:datagram D:telegram