吴某是甲公司法定代表人，吴某依据《中华人民共和国勘察设计管理条例》将厂房设计任务委

以下关于口腔颌面部损伤伤员急救的叙述中，哪项是错误的（）。

A.有条件时应尽早进行清创缝合术，无条件时应尽早包扎创口，防止外界细菌继续侵入

B.伴发颅脑损伤的病员应卧床休息，严密观察，暂不作不急需的检查和手术

C.病员如有脑脊液鼻漏或耳漏，应及时作鼻腔或耳道填塞与冲洗，以免引起颅内感染

D.对于昏迷伤员，应特别注意呼吸道通畅，防止发生误吸和窒息

E.对于烦躁不安的伤员，可给予适量镇静剂，但禁用吗啡

关于电解水实验的叙述中，氢气表现出的化学性质是（　　）

A．产生的氢气无色、无味

B．试管中能收集到氢气，说明氢气难溶于水

C．氢气的密度小于空气，收集氢气后试管口应向下放置

D．将收集氢气的试管移近火焰，可以听到尖锐的爆鸣声

用子宫输卵管碘油造影的结果诊断生殖器结核，不正确的是

A．子宫腔狭窄或变形，边缘呈锯齿状

B．输卵管伞端膨大

C．盆腔淋巴结、输卵管及卵巢部位有钙化灶

D．碘油可进入子宫一侧或两侧静脉丛

E．输卵管腔细小而僵直或串珠状

轻质细线吊着一质量为m=0.32kg，边长为L=0.8m、匝数n=10的正方形线图总电阻为r=1，边长为的正方形磁场区域对称分布在线图下边的两侧，如图甲所示，磁场方向垂直纸面向里，大小随时间变化如图乙所示，从t=0开始经时间t₀细线开始松驰，g=10m/s²。求：

（1）在前t₀时间内线图中产生的电动势；

（2）在前t₀时间内线图的电功率；

（3）求t₀的值。

Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an （） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （） . As administrators seek to block dangerous email attachments through the recognition of well-known （） , virus writers use other extensions to circumvent such protection.Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （） access to your network.

Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an （） from a friend who asks you to open it.

A．attachment

B．packet

C．datagram

D．message