女性，28岁，第一胎孕28周，因1周来腹部增大，持续性腹胀，气急、心悸、不能平卧2天入院，查：心率102次/分，呼吸32次/分，血压120/80mmHg，下肢浮肿(+ +)，宫底在耻骨联合上40cm，腹围102cm，胎心音未听到，胎方位不清，孕妇应考虑为

A．双胎妊娠
B．急性羊水过多
C．慢性羊水过多
D．胎盘早剥
E．妊娠合并心脏病

Which statement concerning reserve sources of energy for GMDSS is FALSE（）.

A.While the ship is at sea，there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energy

B.Both the VHF and MF/HF installations must be simultaneously supplied

C.A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in power

D.If a UPS or equivalent is used to supply power to the ship's GPS receiver or other source of positional information，a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency source of power