问题
单项选择题
当被测量的导轨直线度误差很大，或工件位置倾角较大时，且无法调整，应选择（）进行测量。
A．条形水平仪
B．框式水平仪
C．合像水平仪
D．三者都可以
答案
参考答案：C
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当被测量的导轨直线度误差很大，或工件位置倾角较大时，且无法调整，应选择（）进行测量。
A．条形水平仪
B．框式水平仪
C．合像水平仪
D．三者都可以
参考答案：C
| 选词填空。 | |
2. ______ is it? It's eight o'clock. 3. ______ does he usually watch TV? On Saturday and Sunday. 4. _____ is his favorite subject? It's P.E.. 5. ______ are your classmates? They are in the classroom. 6. ______ do you like math? Because it's difficult but interesting. |