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【简答题】
耦合分哪些种类?请从耦合度从高到低排序
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举一反三
【单选题】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
【单选题】The time has come ______ we can make extensive use of nuclear energy．
A.
when
B.
which
C.
since
D.
while
【单选题】治疗肺炎球菌性肺炎,停用抗生素指征一般是
A.
体温降至正常后3天
B.
体温降至正常后1周
C.
温降至正常后2周
D.
症状、体征完全消失
E.
X线显示炎症阴影完全消失
【简答题】While fossil fuels—still generate roughly 85 percent of the world’s energy supply， it’s clearer than ever that the future belongs to renewable sources such as wind and solar. The move to renewables is...
【单选题】______can notice tiny changes in air pressure，gravity，or the magnetism of earth．
A.
All animals
B.
Some animals
C.
Mammals
D.
Men
【简答题】A．A pond can be compared to a round-the-clock restaurant. B．All kinds of plans and animals will move in soon after a pond is dug. C．Few of the animals in a pond live on plants. D．Not all the animals i...
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