【单选题】The researchers had taken the Thai trial to be more effective by ______.
A.
injecting one vaccine for the immune system
B.
injecting two vaccines to boost the responses
C.
injecting one vaccine for the immune system and another to boost the responses
D.
putting three synthetic HIV genes into the body
【单选题】血液在血管和心脏组成的运输管道内周而复始地流动.下列对血液循环的叙述错误的是( )
【单选题】关于双重循环的表述错误的有()。 ①双重循环由两个单循环在程序中前后排列组成 ②双重循环分成内循环和外循环,它们内外嵌套,不得交叉 ③双重循环的内循环部分实际上可以看成是外循环的循环体
【多选题】心理学家勒温(Lewin)从变革的一般特征出发,总结出组织变革实施计划的基本阶段主要是( )。
【单选题】血液在血管和心脏组成的运输线内周而复始地流动。下列对血液循环叙述错误的是( )
【单选题】Which of the following is NOT true?
A.
The rarer material an antique is made of, the more valuable it is.
B.
Most antiques belong to the decorative arts.
C.
An antique may be valuable because of its design.
D.
Household furnishings are most likely to become antiques.