对别人进行批评时,要尽量使用转化、启发、暗示等迂回的言语方式。
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两块钢板或两种型钢构件需要连接成丁字形或直角形,一般都用()连接。
A. 槽钢
B. 工字钢
C. 角钢
D. 不确定
If the high-pressure switch on the compressor opens and stops the compressor a possible cause could be:()
A. too much cooling water going through the condenser
B. not enough refrigerant in the system
C. a leak in the evaporator coils
D. no enough cooling water going through the condenser
根据国家电网公司变电验收管理规定,变电站技改工程到货验收的组织分工如何规定?
正弦交流电的三要素是()
A. 最大值、角频率、初相角
B. 周期、频率、有效值
C. 最大值、有效值、频率