驾驶车辆由明处驶入暗处或由暗处驶入明处,眼睛有一个适应过程。
参考答案:对
七十八亿五千零四万九千写作______,改成以亿为单位的数是______,四舍五入到亿位约是______.
Don’t all speak at once! ______ , please.
A.Each at one time
B.One by one time
C.One for each time
D.One at a time