题目内容

为了避免顾客产生抵触心理,关联推荐只能选择与顾客购买商品功能相似的商品。( )

A. 对
B. 错

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Please fill in the blanks according to hints given in brackets.The New Year (1.庆祝活动) Around the WorldNew Year’s Day is one of the few universal (2.公共假日)in the world, when most people do not need to (3.上班). While some of us celebrate it only(4.一天一夜), for others it may be a long festival lasting for about one week. In the last 30 years businessmen have (5.借机)to promote more goods and to hold lots of (6.年底促销活动). (7.大多数人)would then take their time to go shopping (8.兴高采烈地).

发现一次击穿发生时如不有效地限制电流,Ic增大到某个临界点时会突然急剧上升,同时伴随着电压的陡然下降,这种现象称为( )。

A. 雪崩击穿
B. 二次击穿
C. 擎住效应

GTR在电力电子电路中,工作在开关状态,即工作在截止区或放大区。

A. 对
B. 错

Power MOSFET是双极型晶体管。

A. 对
B. 错

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