测量中仪器视线高应等于后视点的高程（）。
A．加上前视读数
B．减去前视读数
C．加上后视读数
D．减去后视读数
参考答案：C
—I hear Yang Yan made an English speech at school yesterday.
—_______, and _______.
A．So she did; so did I
B．So did she; so I did
C．So she was; so I was
D．So was she; so I was
下列检查结果提示肾衰患者进入尿毒症期的是
A．肾小球滤过降至50ml/min
B．内生肌酐清楚率降至30 ml/min
C．内生肌酐清楚率降至20 ml/min
D．血肌酐达到445μmol/L
E．血肌酐达到707445μmol/L
