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【单选题】
下列关于输血的叙述,哪一项是错误的A.
ABO血型相符者输血前仍需做交叉配血
B.
O型血可少量、缓慢输给其它血型者
C.
AB型者可少量、缓慢接受其它血型血
D.
Rh阳性者可接受Rh阴性的血液
E.
父母的血可直接输给子女
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举一反三
【单选题】Insurance premiums do not become too high because ______.
A.
not many people insure themselves
B.
premiums depend on the risk of loss
C.
insurers have to be more competitive
D.
insurance companies can never lose money
【单选题】Which of the underlined expressions is more formal?
A.
We can give insurance companies incentives to focus more on taking care of the sick than on coming up with reasons to insure only the healthy.
B.
We can give insurance companies incentives to focus more on taking care of the sick than on coming up with rationales to insure only the healthy.
【简答题】计算动态电路初始条件时,一般分三步进行。第一步,画出0_的等效电路,计算电容上的 (电流/电压)或者电感上的 (电流/电压)。这时,电容应该视作 (开路/短路),电感应该视作 (开路/短路)。第二步,根据换路定律,等到0+时候的电压、电流值。第三步,画出0+的等效电路,根据需要求解各电压电流。这个时候,电容应该用 (电压源/电流源)来代替,电感应该用 (电压源/电流源)来代替。
【简答题】试画出压电式传感器与电荷放大器相连的等效电路图，并说明电荷放大器的输出电压“与传感器产生的电荷量q及电荷放大器反馈电容C之间的关系。
【单选题】163 Many companies self insure against some risk. Problems which can arise from self-insurance include:
A.
failure to reserve funds to handle worst case scenarios (low probability events) resulting in severe financial damage to the company
B.
stiff competition from insurance companies
C.
confusion of business risks with insurable risks.
D.
A and C
E.
All of the above
【简答题】试画出图中各互感耦合电路的受控源等效电路。
【单选题】45 Many companies self insure against some risk. Problems which can arise from self-insurance include:
A.
failure to reserve funds to handle worst case scenarios (low probability events) resulting in severe financial damage to the company
B.
stiff competition from insurance companies
C.
confusion of business risks with insurable risks.
D.
A and C
E.
All of the above
【简答题】试画出压电式传感器与电荷放大器相连的等效电路图，并说明电荷放大器的输出电压“与传感器产生的电荷量q及电荷放大器反馈电容C之间的关系。
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