【简答题】Bush has been somewhat less outspoken, apparently sensitive to being seen as ____(pressure) his successor at a tough moment.
【单选题】has a pressure less than atmospheric pressure.
【单选题】has a pressure less than astomospheric pressure.
【单选题】If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed.
【多选题】下面选项中,属于最普遍的关于最早岩画产生原因的观点的是()。