肺炎双球菌侵入人体气管及支气管上皮黏膜，引起咳嗽，肺炎双球菌营养方式为[ ]
A．寄生
B．腐生
C．自养
D．三者均不是
答案：A
The oil price has _______ a lot these days because of the war .
A．gone back
B．gone up
C．gone over
D．gone out
