网络营销是电子商务的组成部分，开展网络营销并不等于一定实现了电子商务。
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当前中国商业支付体系不够完善。
A. 对
B. 错
2.1.1 What’s the trunk in the following long sentence?Hearing impairment （听力障碍） or other auditory function deficit （缺陷）in young children can have a major impact on their development of speech and communication, [resulting in a detrimental（ adj. 不利的）effect on their ability to learn at school].
A. SVO-Hearing impairment or other auditory function deficit in young children can have a major impact on their development of speech and communication.
B. SVP-Hearing impairment or other auditory function deficit in young children can have a major impact on their development of speech and communication.
C. SVO-Hearing impairment or other auditory function deficit in young children can have a major impact.
D. SV-Hearing impairment or other auditory function deficit in young children can have a major impact.
在假设检验中，显著性水平 α表示的是犯第类错误的概率。
A. 一
B. 二
C. 不一定
在假设检验中，当我们做出拒绝原假设而接受备择假设的选择时意味着（）
A. 小概率事件发生了
B. 原假设一定是错误的
C. 原假设也可能是正确的
D. 犯错误的概率大于显著性水平α
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