【单选题】The earliest humans arrived several million years ago, but only 150,000 to 00,000 years ago, did cultures, language, and the arts._____
【单选题】The earliest humans arrive several million years ago, but only 150,000 to 200, 000 years ago, did cultures, language and the arts ________.
【单选题】在提速道岔上进行养护维修时,应注意观察尖轨跟部限位器A、B块的间隙变化。当道岔何于跨区间无缝线路区段时,在锁定温度下,间隙应符合()的要求。
【单选题】(47703) 在提速道岔上进行养护维修时,应注意观察尖轨跟部限位器 A 、 B 块的间隙变化。道岔位于跨区间无缝线路区段,在锁定温度下,间隙应符合()的要求。
【单选题】In the space provided, write the letter of the sentence that best expresses the implied main idea of each of the following paragraphs. ____ 1 The earliest humans probably used the lengthening and shor...
A.
Throughout history, people have found better and better ways to measure the passing of time.
B.
The hourglass is a slightly more recent invention than the sundial.
C.
The first methods of measuring the passing of time took advantage of the changing shadows cast by the sun throughout a day.
D.
A primitive clock invented in about 1300 was the most exact way to tell time up to that point.
【单选题】在提速道岔上进行养护维修时,应注意观察尖轨跟部限位器 A.B块的间隙变化(中级线路工用)。道岔位于跨区间无缝线路区段,在锁定温度下,间隙应符合()的要求(中级线路工用)。
【多选题】下列关于税法要素的表述中,不正确的有()。