()是高强度气体放电光源中显色性最好的光源。
A.荧光灯;
B.金属卤化物灯;
C.高压钠灯;
D.高压汞灯
参考答案:B
---Do you think yesterday’s math problem was difficult?
---Yes. I could work it out.
A.hardly
B.easily
C.finally
D.nearly
DOHC发动机装配线(装配A线)上有几个自动检测工位?()
A、1个
B、2个
C、3个
D、4个以上