下列是阴道灌洗护理操作的注意事项，请问哪一项是错误的
A. 妊娠期，必要时也可以阴道灌洗
B. 灌洗液的温度一般为41～43℃
C. 灌洗筒至床沿的距离不超过70cm
D. 采取的体位为膀胱截石位
E. 未婚女性一般不做阴道灌洗，必要时可用导尿管代替灌洗头
会阴热敷时，一次热敷的时间一般为
A. 8～10分钟
B. 12～15分钟
C. 15～30分钟
D. 15～20分钟
E. 30～35分钟
Which of the following suggests that a nation will export the commodity in the production of which a great deal of its relatively abundant and cheap factor is used?
A. The Linder theory
B. The product life cycle theory
C. The MacDonald theory
D. The Heckscher-Ohlin theory
According to Staffan Linder, trade between two countries tends to be most pronounced when the countries:
A. find their tastes and preferences to quite harmonious.
B. experience economies of large-scale production over large output levels.
C. face dissimilar relative abundances of the factors of production.
D. find their per capita income levels to be approximately the same.
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