安装压力表时可以使用开口为（）活动扳手进行紧固。
A、14mm
B、24mm
C、46mm
D、55mm
参考答案：B
Jack didn't pass the driving test, but he still ________.[ ]
A. hopes to
B. hopes so
C. hopes that
D. hoped
柴油机不能启动时的故障排查方法？
