下列说法正确的是 ①标准状况下，22.4 L己烯含有的分子数为6.02×1023

若信号量S的初值为1，执行一次P(S)操作后S的值为( )

A．-1

B．0

C．1

D．2

Certificates are （） documents attesting to the （） of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to （） someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital （） of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.

Certificates help prevent someone from using a phony key to （） someone else.

A．impersonate

B．personate

C．damage

D．control

碳水化合物可分为两类，一种对实验动物肠粘膜有刺激作用，可促进胃肠蠕动和粪便的排泄，在反刍动物的瘤胃和兔的盲肠内，经微生物的发酵作用，一部分变为脂肪酸为动物利用。它是（）。

A.粗纤维

B.细纤维

C.无氮浸出物

D.含氮浸出物

安全文明施工实施细则、工程施工强制性条文执行计划等安全策划文件编、审、批的要求是什么？

In a group therapy setting, one member is very demanding, repeatedly interrupting others, and taking most of the group time. The nurse’s best response would be（）

A. "Will you briefly summarize your point because others need time also"

B. "Your behavior is obnoxious and drains the group. "

C. To ignore the behavior and allow him to vent.

D. "I’m so frustrated with your behavior. "