Task 4 Listen to the second part of the passage and tick the requirements for a clown that Miss TeaCup mentioned.[音频]
A clown must wear heavy makeup and thick costume.
B. A clown must be handsome or beautiful.
C. A clown must have professional skills.
D. A clown must be funny outside but serious inside.
E. A clown must be friendly to the audience and patient.
F. A clown must answer audience’s questions in an honest way.
G. A clown must hold passion for the job.
H. A clown must know how to help the children with autism (自闭症).
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在毛细管电泳的几种常用分离模式中,适用于分离多种氨基酸混合样品的有( )
A. CZE
B. MEKC
CGE
D. CITP
E. CIEF
F. CEC
()指一个中性原子获得一个电子成为负离子所释放出的能量
A. 电负能
B. 电离能
C. 亲和能
固体也会有难以压缩的现象,这是因为原子之间存在着()
A. 吸引力
B. 库仑力
C. 排斥力
L代表的是()量子数
A. 主
B. 轨道
C. 角
D. 自旋