多项选择题

以下哪些素养是我们应对碎片化传播所需具备的

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单项选择题
以下园林植物中，不属于抗盐碱植物的是（）。
A．吉祥草
B．美丽胡枝子
C．枸杞
D．花叶扶芳藤
问答题
建设工程监理招标过程中，招标人与中标人签订工程监理合同的时间是（　）
A、自发出中标通知书之日起30日
B、自发出中标通知书之日起15日
C、自确定中标人之日起30日
D、自确定中标人之日起15日
答案：1.答：在监理中标通知书发出后第45天签订监理合同不妥，依照招投标法，应于30天内签订合同。在签订委托监理合同后双方又...
问答题
公司的概念是什么？
答案：公司是依法设立的，以营利为目的，由股东投资形成的，以有限责任公司和股份有限公司为表现形式的企业法人。
单项选择题
Which of the underline expressions is the hedging of the following sentences.There is no difficulty in explaining how a structure such as an eye or a feather contributes to survival and reproduction; the difficulty is in thinking of a series of steps by which it could have arisen.
A、There is no difficulty in explaining how a structure such as an eye or a feather contributes to survival and reproduction; the difficulty is in thinking of a series of steps by which it could have arisen.
B、There is no difficulty in explaining how a structure such as an eye or a feather contributes to survival and reproduction; the difficulty is in thinking of a series of steps by which it could have arisen.
C、There is no difficulty in explaining how a structure such as an eye or a feather contributes to survival and reproduction; the difficulty is in thinking of a series of steps by which it could have arisen.
D、There is no difficulty in explaining how a structure such as an eye or a feather contributes to survival and reproduction; the difficulty is in thinking of a series of steps by which it could have arisen.
判断题
H桥直流变换器可以实现四象限运行。( )
答案：正确