【判断题】大小和方向都不随时间作周期性变化的电流称为交流电
【简答题】A: I'd like to attend an English course. It's very important ___________ me. I _________ to know more English to do my job perfectly. I talk to English-speaking customers every day and sometimes I can...
【判断题】It's very helpful to have some background noise when you are on the phone, such as radio, televisions ,and even computer bleeps.
【单选题】The doctors have recommended that she _______ on, but she has not yet made up her mind.
【简答题】在5张卡片中,有2张正数卡片和3张负数卡片,从中任取2张作乘法练习,其积为正数的概率是______.
【判断题】It's very helpful to have some background noise when you are on the phone, such as radio, televisions and even computer and bleeps.
【判断题】大小和方向都不随时间作周期性变化的电流称为交流电
【单选题】You can just start using it. You don't have to spend hours reading the manual – it's very __________.
【多选题】why / called me / yet / she / hasn't ?
【简答题】你能设计出抽签游戏的卡片吗?请在卡片上填上数。 设计要求:(1)卡片上只可能出现1、2、3。 (2)可能抽到2。 (3)抽到1的可能性最大。 (4)抽到2和抽到3的可能性相等。