血压通常在()处测得
A.颈动脉
B.肱动脉
C.股动脉
D.主动脉
答案:B
由生活中测量血压,可知道血压是在肱动脉处测得的。
Since David ______ downloaded a virus into his computer, he can not open the file now.
A.readily
B.accidentally
C. horribly
D.irregularly
冲裁模工作零件的最终热处理经常选用()方法。
A、调质
B、正火
C、时效处理
D、淬火