【单选题】下面哪一项描述符合完全抗体
B.
此抗体能与抗原结合,在一定条件下出现肉眼可见的抗原抗体反应现象
C.
能与相应抗原结合,在一定条件下不出现抗原抗体反应现象
【简答题】已知柠檬酸的pK a1 ~pK a3 分別为3.13,4.76,6.40。则pK b2 = :pK b3 = 。
【多选题】抗体作为诊断试剂可用于鉴定抗原,作病原学的诊断和血型测定,这依赖于抗体和抗原的特异性结合在体外可呈现()反应
【单选题】南极洲和北冰洋绝大部分都位于寒带,但南极洲平均气温比北冰洋低得多,其原因是( ) 1北冰洋的纬度位置比南极洲低 2南极洲地势比北冰洋高 3南极洲被冰雪覆盖,对阳光反射强 4北冰洋海面吸收太阳辐射多
【简答题】我国在两极地区一共建设四个科考站,如图。完成问题。 小题1:四个科考站中,没有极昼极夜现象的科考站是 A.黄河站 B.昆仑站 C.中山站 D.长城站 小题2:南极洲和北冰洋的绝大部分都位于寒带,但南极洲的年均气温比北冰洋低得多,其原因是 ①北冰洋的纬度位置比南极洲低 ②南极洲地势比北冰洋高 ③南极洲被冰雪覆盖,对阳光反射强 ④北冰洋海面吸收的太阳...
【单选题】The study of the way speech sounds are made by the vocal organs belongs to ______.
C.
articulatory phonetics
D.
experimental phonetics
【多选题】The structure and function of the tectum located in the midbrain are:
A.
The most posterior part of the midbrain, known as the tectum, contains two pairs of rounded projections: the superior & inferior colliculi.
B.
The superior colliculi contain many nuclei involved in controlling the eye to produce vision, including focusing, scanning, and blinking; nerve signals that control the eye are carried by the oculomotor nerve, whose roots arise in the superior colliculi.
C.
The inferior colliculi play a similar role for the sense of hearing by forming relays for auditory pathways to the cerebrum.
D.
Auditory reflexes, such as the startle reflex in response to loud sounds, are processed in the inferior colliculi.