【单选题】The Chinese people will never yield ______ any military threat from any country.
【单选题】English is used by more people than is__________language except Chinese.
【单选题】People cannot close their eyes to the facts______.
【单选题】-Are there any people here? -__________ [ ]
【单选题】下列有关磁粉检测连续法湿法的叙述,哪条是错误的?
B.
磁化强度大约为试件达到饱和磁通密度的80%。
C.
施加的磁悬液在检测面上流动,待磁粉停止运动后,再切断电源。
【单选题】She is ready to help people ______. [ ]