男性，65岁，高血压病史，目前血压180/105mmHg，X线和心电图示左心室肥大，

急性心肌梗死肌酸肌酶的衍变规律是（）

A.起病3小时升高，第2～5天出现平坦峰，持续3周

B.起病4小时内升高，16～24小时达高峰，3～4日恢复正常

C.起病6小时内升高，24小时达高峰，3～4日恢复正常

D.起病6～12小时升高，24～48小时达高峰，3～6日恢复

E.起病8～10小时升高，2～3日时达高峰，1～2周正常

除去氯化钾中少量的硫酸钾，加入试剂的最佳顺序是（　　）

A．BaCl₂溶液→K₂CO₃溶液→盐酸

B．Ca（NO₃）₂溶液→K₂CO₃溶液→盐酸

C．CaCl₂溶液→K₂CO₃溶液→盐酸

D．BaCl₂溶液→Na₂CO₃溶液→盐酸

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the______(71) algorithm. Routing protocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal of the routers to forward packets to various_______ (72). Routers running RIP send their advertisement about cost every________(73) seconds. A router also sends an update message whenever an update from another router causes it to change its routing table. It is possible to use a range of different metrics or costs for the links in a routing protocol. RIP takes the simplest approach, with all link costs being equal _______(74). Thus it always tries to find the minimum hop route. Valid distances are 1 through_________(75) ,This also limits RIP to running on fairly small networks.

空白处____（74）应选择（）

A.1 

B.15 

C.16 

D.lengthofthelink

表达序列标签(expressed sequence tag，EST)

T淋巴细胞呈阳性反应的化学染色是（）

A.醋酸AS-D萘酚酯酶染色

B.碱性α-丁酸萘酚酯酶染色

C.碱性磷酸酶染色

D.α-醋酸萘酚酯酶染色

E.过氧化物酶染色