发动机进气过程结束时，气缸内压力总是()。
A.大于大气压力
B.等于大气压力
C.与大气压力无关
D.小于大气压力
参考答案：D
Indian authorities have decided to remove the dry coconuts from trees near the building to ensure
Mr Obama will not become the _______ of falling coconuts.
A. witness
B. victim
C. criminal
D. consultant
按公式计算此小儿的体重约是()。
A．9kg
B．10kg
C．12kg
D．13kg
E．14kg
