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【单选题】
患者男,48岁。车祸外伤来急诊科就诊。护士为其测血压,因动脉搏动微弱听不清,需要重复测量,下列操作错误的是A.
将袖带内空气驱尽
B.
使水银柱降至“0”点
C.
稍待片刻重新测量
D.
袖带持续加压直到听清为止
E.
测量时先读收缩压，后读舒张压
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【简答题】我国液压油的牌号是采用 时的 的平均值来表示,单位是 。
【单选题】Based on Figure 3, for a given seismograph, the time elapsed between the arrival of the first p-waves and the arrival of the first s-waves from an earthquake focus 10,500 km away would most likely be:
A.
less than 5 min.
B.
between 5 min and 7 min.
C.
between 8 min and 10 min.
D.
more than 10 min.
【单选题】Based on the figure, a sound of a given frequency will have the highest intensity for which of the following sets of conditions? Sound is passing through； S
A.
water； 100%
B.
water； 010–8%
C.
air； 100%
D.
air； 010–8%
【单选题】How many orchid seeds are typically pollinated at one time?
A.
No specific figure is given in the passgae.
B.
2,000.
C.
20,000.
D.
200,000.
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