判断命题“若∠1=∠2 是同位角，∠2 与∠3 也是同位角，那么∠1 与∠3是同

If you want to learn English well, you must________ English as often as possible.[ ]

A. practice to speak    

B.  practice speaking

C. practicing speaking    

D.  to practice speak

下列关于条件反射的生物学意义的叙述，哪项是错误的

A．后天形成，数量无限
B．具有极大的易变性
C．具有高度的适应性
D．可脱离非条件反射独立形成
E．条件反射建立的过程就是学习记忆的过程

一般大手术后施行的级别护理是

A．特级护理

B．一级护理

C．二级护理

D．三级护理

E．特别护理

Directions:

You are required to write an essay on the topic Which Weighs More: School Brand or Major You should write 160-200 words and base your essay on the outline and the picture below:

1) Show your understanding of the symbolic meaning of the picture below.

2) Make a comparison in terms of:

· the benefits of studying in a prestigious university.

· the benefits of choosing a favorite major.

· the drawbacks

3) Your preference.

You should write neatly on ANSWER SHEET 2.

样板、样杆的画法主要有哪几种？