离子水化膜的厚度与离子半径大小有关。对于同价离子，半径越小则水膜越厚。则下列离子水膜

男，60岁，主诉近2天头晕、胸闷、心悸，来院就诊。

如患者脉压明显增大，应考虑（）

A.主动脉瓣狭窄

B.心包积液

C.心力衰竭

D.主动脉硬化

E.心肌梗死

已知a、b是异面直线，直线c平行于直线a，那么c与b

A．不可能是相交直线 B．不可能是平行直线 C．一定是相交直线 D．一定是异面直线

Questions 14-18

·Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below.
·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet.
·Do not mark any letter twice.
14. According to Dr. Score, lightning is caused by hail falling through ______.
15. The refrigerated rod served the same functions as ______.
16. Ice particles bouncing off hail falling through a cloud acquire ______.
17. In the paragraph four the word "duplicated" means ______.
18. According to S.E. Regnolds, there could be no lightning without ______.

• A. copy
• B. a positive charge
• C. a negative charge
• D. super cooled clouds
• E. falling hail clouds
• F. hail and super cooled clouds
• G. moisture particles

根据药物归经理论，地骨皮主要归于（）

A．肺、胃、肾经

B．肺、脾、肾经

C．心、肝、肾经

D．肺、肝、肾经

E．心、肺、肝经

检修时，对电感式远传压力表电气部分检查的要求（）

A.差动变压器的线圈应清洁，铁芯应平直无积灰

B.测量线圈电阻值应符合规定值，其偏差应不大于规定值的5%

C.元件插板、插座和校准用插孔均应清洁，接触良好

D.当交流电源电压变化额定值的±10%时，稳压电源输出直流电压的变化量应不大于额定输出值的±0.5%