My bike is old and _____ is new. [ ]
A. you
B. your
C. yours
答案：C
呼吸器当气瓶内压力下降至（）MPA±0.5MPA时报警器应开始起鸣报警。
A.2.0
B.3.0
C.4.0
D.5.5
人格形成的影响因素
