【单选题】Na + -K + 泵是一种常见的 ATP驱动泵(如图所示),是一种在动物细胞的能量系统中起主要作用的载体,也是一种能催化ATP水解的酶。这种泵每消耗1分子的ATP,就逆浓度梯度将3分子的Na + 泵出细胞外,将2分子的K + 泵入细胞内。由此可知( )
A.
该载体不一定能催化ATP水解,但一定能促进物质的转运
B.
Na + 通过Na + -K + 泵的跨膜运输方式是主动运输,K + 通过Na + -K + 泵的跨膜运输方式是协助扩散
C.
葡萄糖进入红细胞的方式与Na + 和K + 通过Na + -K + 泵的跨膜运输的方式相同
D.
Na + -K + 泵对维持动物细胞的渗透压平衡起重要作用
【单选题】患者,女,25岁,反复出现皮肤紫癜,月经量多1年余,此前无服药史。查体:脾肋下1cm。血象:血红蛋白105g/L,白细胞5.4×10 9 /L,血小板25×10 9 /L。其余血沉、尿常规及肝功能均正常。抗核抗体谱阴性,骨髓象示颗粒型巨核细胞增多。以下最可能的诊断是()
【单选题】The goods shipped already if your L/C had arrived in time.A. would be B. must have been C. had been D. would have been
【单选题】下列关于细胞膜物质转运的叙述 哪一项 是错误的
【单选题】If there were no subjunctive mood, English much easier. A. will be B. would have been C. could have been D. would be
【简答题】绘制“取回由删除命令所删除的对象”的快捷命令是 ,命令行是 。
【单选题】Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past.
A.
would not have been caught
【判断题】在Excel中”删除”命令和”删除工作表”命令是等同的。
【简答题】对表中记录逻辑删除的命令是__________。