【单选题】What will Bertelsmann be forced to do?
A.
To go public no later than 2005.
C.
To pay interest to the public.
【简答题】牵张反射有____、____两种类型,其中____是维持躯体姿势的最基本反射活动。
【单选题】生活中使用的塑料食品盒、水杯等通常由聚苯乙烯制成,其结构简式为: 。根据所学知识,可以判断 [ ]
【简答题】简述牵张反射类型、特点及在运动实践中的应用。
【简答题】聚苯乙烯是一种发泡塑料,可用于包装材料等。聚苯乙烯的结构简式为: ,试回答下列问题: (1)聚苯乙烯的单体是(写结构简式): 。该单体可发生的化学反应类型有 。(写两种) (2)试推测聚苯乙烯是 型分子(填“线型”或“体型”),它能否溶解于CHCl 3 , 。(填“能”或“否”),它具有 性(填“热塑”或“热固”)。
【单选题】What does the author mean by 'No more' in Paragraph 4?
A.
College professors are forced to improve his pedagogy.
B.
There is no competition among college students.
C.
Teaching capacity of college professors can be assessed.
D.
There is no need for plumbers and kindergarten teachers to obtain certification.
【简答题】解释聚四氟乙烯称为“塑料王”的原因?聚四氟乙烯分子结构具有以下特点: