Because Edgar was convinced of the accuracy of this fact,he__________ his opinion.
A. struck at
B. strove for
C. stuck to
D. stood for
The designing of a satellite in the heavenly environment is not absolutely an easy job.
A. by all means
B. by any means
C. by every means
D. by no means
在实际统计工作中,为了消除季节变动的影响,常计算( )。
A. 年距增长量
B. 逐期增长量
C. 累计增长量
D. 平均增长量
教育的最基本要素包括教育者、受教育者、教育内容和( )。
A. 教育物资
B. 教育材料
C. 教育媒介
D. 教育环境