【单选题】He looks rich. _____, he is very poor. [ ]
【简答题】某压力测量系统由压电式压力传感器-电荷放大器-记录仪组成。若压力传感器灵敏度为10PC/kPa,电荷放大器的灵敏度为0.5V/PC,记录仪的灵敏度为20mm/V,则系统总灵敏度为 。
【单选题】From the third paragraph of the passage, we can conclude that young adults tend to belie, that certain types of clothing can ______.
A.
change people’s conservative attitudes toward their lifestyle
B.
help young people make friends with the opposite sex
C.
make them competitive in the job market
D.
help them achieve success in their interpersonal relationships
【单选题】Hainan is _______-island.
A.
China ’s second largest
B.
the China ’s second largest
C.
the second China ’s largest
D.
China’s the second largest
【单选题】设char *s='china';则printf('%s,%c,%c/n',s,*s,s[3]);的输出是( )
【简答题】某压电传感器灵敏度 S1=200nc/Mpa,将它与增益为 1 mV/nc 的电荷放大器相连, 放大器输出接到一个灵敏度为 2mm/V 的笔式记录仪上,试计算这个系统的总灵敏 度为多大?当压力变化为 30Mpa 时,记录笔在记录纸上偏移量是多少?