投运金属检测器前应做哪些准备工作?
参考答案:
1)将电送至金属检测器开关。
2)启动电机运行。
3)用铁器检验检测器是否灵敏好用。
4)正常后准备投料生产。
A _______ broke the newly-planted tree, ______ the planter feel very angry and sad.
A.falling stone; made
B.fallen stone; and made
C.falling stone; making
D.fallen stone; to make
下列语句正确的是
A.IfX<3*Y And X>Y Then Y=X^3
B.IfX<3*Y And X>Y Then Y=X3
C.IfX<3*Y:X>Y Then Y=X^3
D.IfX<3*Y And X>Y Then Y=X**3