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问题 单项选择题

下列不符合无菌采集的是

A．采集的标本应无外源性污染
B．采集血液、脑脊液、关节液等无菌标本，应严格进行无菌操作
C．采集窦道标本时，在窦道口取标本
D．应明确目的菌，分离培养时采用特殊选择性培养基
E．采集的标本应放于无菌容器内

答案

参考答案：C

单项选择题

A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication, TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocolis to create a  (2) and error-control mechanism at the transport level. TCP uses a sliding(3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve(4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends  (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

空白（1）处应选择（）

A.numbers

B.connections

C.diagrams

D.resources
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多项选择题

个体工商户李某拖欠甲公司货款5万元，甲公司多次催讨无果，遂向李某所在地的基层人民法院申请支付令。法院受理后经过审查，认为该申请成立。下列说法哪些是正确的( )

A．如果在向李某送达支付令时，李某拒绝接收，人民法院可以留置送达

B．如果李某在法定期间提出书面异议，人民法院应对异议理由是否成立进行审查

C．如果李某在法定期间向法院书面说明目前还钱确有困难并承诺在2个月后一定还清，则支付令可不生效

D．如果李某在法定期间未提出书面异议但向甲公司所在地的人民法院起诉，请求确认该债务已经偿还，则支付令的效力不受影响
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