【多选题】What are the main schools of traditional Chinese Kung Fu?
【简答题】已知sinαcosβ= 1 2 ,则cosαsinβ的取值范围是______.
【简答题】热继电器主要由 、双金属片和 组成。热元件由发热电阻丝做成;双金属片由两种热膨胀系数不同的金属辗压而成。当双金属片受热时,会出现弯曲变形。使用时,把热元件 于电动机的主电路中,而常闭 串接于电动机的控制电路中。
【单选题】What is the main idea of the passage?
A.
American firms' human resource management strategies affect their competitive capacity.
B.
Human resource management is a key factor in a fu-m's survival.
C.
The cost of work training in America is higher than that in Japan and Germany.
D.
American firms are different from Japanese and German firms in human resource management.
【单选题】已知角 α 是锐角, β 角钝角,则 α-β 的范围是( )
【简答题】已知sinα+sinβ= ,则cosα+cosβ的范围为( )。