在下列各项中，可以作为连结点使用的有（）
A.国籍
B.意思自治
C.主权
D.受理案件的法院所在地
参考答案：A, B, D
Using Dr Yuang's hybrid rice, nowadays farmers are producing harvests ________ before.
A．as twice large as
B．twice as much as
C．twice as large as
D．as twice much as
胰十二指肠切除术后患者，禁食，持续胃肠减压，静脉输营养液5天，腹胀，无肛门排气，肠鸣音减弱，腹部无压痛，四肢软弱无力，膝反射减弱，心电图显示T波低宽。该患者存在
A．低钾血症B．低钙血症C．等渗性缺水D．高渗性缺水
