轻度哮喘发作时下述检测结果可能有误的是
A．Pa02降低B．PaCOz降低C．pH降低D．Sa02正常E．PaC02升高
参考答案：E
Bell______ the telephone in 1876.
A. find
B. found
C. invented
D. was invented
如何进行科学的复习？
