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【简答题】
反时限过电流保护其动作时间随电流的大小而变化,电流越大动作时间越短,电流越小动作时间越长。()
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举一反三
【单选题】有关卵巢的周期性变化,下述哪项不对
A.
排卵发生在下次月经来潮前14d左右
B.
在卵泡发育过程中产生雌、孕激素
C.
排卵后7～8d黄体发育成熟
D.
黄体细胞分泌雌、孕激素
E.
黄体衰退后，月经来潮
【单选题】有关卵巢的周期性变化,下述哪项不对
A.
排卵发生在下次月经来潮前14日左右
B.
在卵泡发育过程中产生雌、孕激素
C.
排卵后7-8日黄体发育成熟
D.
黄体细胞分泌雌、孕激素
E.
正常周期中雌激素分泌有两个高峰
【单选题】A recent survey indicated that more and more consumers have become accustomed to purchasing____groceries on the Internet.
A.
ours
B.
theirs
C.
their
D.
ourselves
【简答题】从业人员应当接受安全生产教育和培训，掌握安全生产知识，提高安全生产技能，增强事故预防和应急处理能力。判断对错
【单选题】Young consumers often have not established their credit. Many do not have steady in- comes. They might have difficulty borrowing money from an agency in business to make loans. Parents or relatives ar...
A.
the reason why young consumers may borrow money from parents or relatives.
B.
the advantages and disadvantages in borrowing money from parents or relatives.
C.
where young consumers can borrow money
D.
young consumers' habit in borrowing money
【单选题】Its consumers have a sincere interest in the behavior. of the company _______they place their trust.
A.
which
B.
in which
C.
whose
D.
whichever
【简答题】The opinion that 'Frankenstein foods' have had adverse health effects on consumers lacks enough ______.
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