加入催化剂能()反应活化能。
A、无法判断
B、提高
C、不改变
D、降低
参考答案:D
Maybe it is time for the rest of society to the fact I may not be able to walk, there are many other great things I can do.
A.adjust to; that
B.get used to; that while
C.adapt to; while
D.go about; that while
油路中漏入空气的诊断现象不包括()
A.柴油机起动不久时,功率足有力气
B.柴油机工作一段时间后逐渐变无力,甚至熄火
C.拧下柴油机滤清器上的放气螺钉,有大量气泡和油沫排出
D.拧下柴油机滤清器上的放气螺钉,排油不畅或产生的气泡、油沫极少