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【单选题】
( )是社会群体德共有现象A.
压力
B.
快乐
C.
语音
D.
交流
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】给赵琴琴测试
【简答题】给赵琴琴测试
【多选题】以下关于需求价格弹性大小与销售收入的论述中,正确的有( )
A.
需求弹性越大,销售收入越大
B.
如果商品富有弹性,则降价可以增加销售收入
C.
如果商品缺乏弹性,则降价可以增加销售收入
D.
如果商品富有弹性,则降价可以提高利润
E.
如果商品为单位弹性,则价格对销售收入没有影响
【简答题】外植体用酒精消毒后要用无菌水冲洗_次,用次氯酸钠消毒后要冲洗_次
【多选题】Regulation of HMG-CoA reductase synthesis by cholesterol is mediated by an elegant system of transcriptional regulation of the HMG-CoA gene. This gene, along with more than 20 other genes encoding enz...
A.
When newly synthesized, these proteins are embedded in the ER. Only the soluble regulatory domain fragment of an SREBP functions as a transcription activator. When cholesterol and oxysterol levels are high, SREBPs are held in the ER in a complex with another protein called SREBP cleavage-activating protein (SCAP), which in turn is anchored in the ER membrane by its interaction with a third membrane protein, Insig (insulin-induced gene protein).
B.
SCAP and Insig act as sterol sensors. When sterol levels are high, the Insig-SCAP-SREBP complex is retained in the ER membrane. When the level of sterols in the cell declines, the SCAP-SREBP complex is escorted by secretory proteins to the Golgi complex.
C.
There, two proteolytic cleavages of SREBP release a regulatory fragment, which enters the nucleus and activates transcription of its target genes, including those for HMG-CoA reductase, the LDL receptor protein, and other proteins needed for lipid synthesis.
D.
When sterol levels increase sufficiently, the proteolytic release of SREBP amino-terminal domains is again blocked, and proteasome degradation of the existing active domains results in rapid shutdown of the gene targets.
【多选题】以下关于需求价格弹性大小与销售收入的论述中,正确的是
A.
如果商品富有弹性，则降价可以扩大销售收入
B.
如果商品缺乏弹性，则提高价格可以增加销售收入
C.
如果商品富有弹性，则降价可以提高利润
D.
如果商品为单位弹性，则价格对销售收入没有影响
【简答题】The temperature to which unsaturated air must be cooled at constant pressure become saturated (without the addition or removal of any moisture) is called .
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