靶式流量计的靶上所受的力的大小和流体的（）的平方成比例.
A.压力
B.流速
C.密度
D.温度
参考答案：B
—____ you got to know my telephone number?
—Through a friend of yours.
A．What was it that
B．How did
C．Where was it
D．How was it that
“据有江东，已历三世，国险而民附，贤能为之用”，这句话形容的是谁？（）
A、曹操
B、刘备
C、孙权
D、刘表
