【单选题】Almost all college teachers will emphasize the importance of students ’ ()in the course at the very beginning of a new semester.
【单选题】设 与 是一阶线性微分方程 的两个不同的解,则下面说法不正确的是( )
【单选题】Americans are now taking steps to solve the problem of alcoholism by ______.
A.
giving courses to teach doctors about drugs and treatments for alcoholics
B.
teaching young students how to drive safely after drinking alcohol
C.
punishing people more heavily for driving after drinking alcohol
D.
decreasing the amount of alcohol drunk by drivers
【判断题】微分方程的通解中含有任意常数,且其个数与微分方程的阶数是相同的。
【单选题】设 与 是一阶线性微分方程 的两个不同的解,则下面说法不正确的是( )
【判断题】马克思主义是科学的理论体系,但它不重视实践。
【判断题】磁电感应式传感器简称感应式传感器,是典型的能量转换型传感器。