剖视图是（）的剖切平面将零件剖开，从剖开的部位看去，直接看到零件的内部形状，使内部轮

比较大小：-5______-7．（填“＞”、“=”、或“＜”）

PFM桥戴一周后右上1瓷面脱落，其主要原因可能是 （）

A.舌侧金属舌面背设计

B.金-瓷衔接处在咬合着力点上

C.金属基底边缘过长

D.金属基底过厚

E.切端瓷过长

(56) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.
(57) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.
(58) is an approach preferred by cable TV providers. In this solution the fiber terminates at an opto-electrical converter and the final segment is a shared coaxial cable.
(59) is a device used to connect two separate network that use different communication protocol.
(60) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

A．MD

B．RSA

C．DES

D．MIB

脆弱类杆菌败血症的病原治疗选用（）

A.替考拉宁

B.甲硝唑

C.氟康唑

D.亚胺培南

E.头孢他定

收缩时使杓状软骨向外、稍向上，使声带外展，声门变大的是：（）

A.环杓后肌

B.环杓侧肌和杓肌

C.环甲肌

D.甲杓肌

E.杓会厌肌