右面是广州亚运会志愿者的标志（图案为红色）。 请从构形角度（文字除外）说明该标志

在结构化布线系统中，传输介质通常选用双绞线和　【 】　。

用括号内所给动词的适当形式填空。

1. Tom and Jim _________ (do) their homework at the moment.

2. Tim usually _________ (get) up at six o'clock.

3. Be quick! Li Lei _________ (wait) for us at the school gate.

4. Han Meimei ________ (like) watching TV. She _________ (watch) TV every evening.

    But now she ________ (not watch) TV. She _________ (get) ready for her final exam.

5. It's six o'clock. My teacher ________ (work) in his office.

The American president who____the freedom    of slaves was shot to death.    [ ]

A. fought with    

B. fought for    

C. fought against    

D. fought back

有关高血压脑出血的手术治疗，下述哪项是不正确的

A．有心、肺、肝、肾等严重疾患者多不宜手术
B．浅部出血应优先考虑手术
C．动脉血压≥200/120mmHg(26.6/16kPa)，眼底出血者多不宜手术
D．大脑半球出血量>30ml，小脑出血>10ml者多不宜手术
E．急性脑干出血手术很少成功

神经细胞静息电位的形成机制

A．K⁺外流+Na⁺内流
B．K⁺平衡电位
C．K⁺外流+Cl^-外流
D．Na⁺内流+Cl^-内流